Using An Impedance As The Final Control Device Patents (Class 323/293)
  • Patent number: 10694616
    Abstract: The present disclosure provides a filament power supply for an electron accelerator and an electron accelerator. The filament power supply includes: a rectifier circuit configured to convert a power frequency AC voltage signal into a DC voltage signal; an inverter circuit configured to convert the DC voltage signal into an AC voltage signal; a sampling circuit configured to sample the AC voltage signal to obtain a current sampling signal or a voltage sampling signal; a pulse width modulation control chip configured to adjust a pulse width modulation signal until a voltage of the current sampling signal is equal to that of a reference current signal, or a voltage of the voltage sampling signal is equal to that of a reference voltage signal; a modulation circuit configured to modulate the power frequency AC voltage signal to obtain a modulation signal and output the pulse width modulation signal and the modulation signal.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: June 23, 2020
    Inventors: Jinsheng Liu, Yaohong Liu, Wei Jia, Xinshui Yan, Wei Li
  • Patent number: 10541605
    Abstract: Some embodiments include apparatuses having a charge pump to generate an output voltage based on a first supply voltage, a second supply voltage, and timing of a clock signal; an output regulator to generate a regulated voltage at a node based on the output voltage; and a monitor circuit to monitor an output current at the node and provide feedback information based on the output current in order to adjust a value of the second supply voltage.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: January 21, 2020
    Assignee: Intel Corporation
    Inventor: Marcin Daniel
  • Patent number: 10503188
    Abstract: A voltage regulator is presented. The output node of the voltage regulator is coupled to an output capacitor via a conductive path that exhibits a parasitic inductance. The voltage regulator has an output amplification stage for deriving the output current at the output node from the input voltage at the input node in dependence of a drive voltage at an intermediate node of the voltage regulator. The voltage regulator has an intermediate amplification stage for providing the drive voltage at the intermediate node based on a differential output voltage. A differential amplification stage determines the differential output voltage in dependence of the output voltage and in dependence of a reference voltage. The voltage regulator has a sensing unit to provide a load indication which is indicative of the output current and a variable impedance coupled to the intermediate node, where the variable impedance is dependent on the load indication.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: December 10, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Carlos Zamarreno Ramos, Frank Kronmueller, Ambreesh Bhattad
  • Patent number: 10450098
    Abstract: Disclosed is a synergistic sterilizing and preserving method for fresh meat with high voltage electric field plasma and nano photocatalysis, which belongs to the technical field of cold sterilization of food package. The method comprises the steps: uniformly mixing a photocatalyst, a coupling agent and coating liquid at a high speed, performing the coupling to obtain modified coating liquid, smearing the coating liquid onto the surface of a plastic packaging film to obtain a packaging material with a photocatalytic bacteriostatic function, packaging fresh meat in an MAP (modified atmosphere packing) manner by adopting the bacteriostatic packaging material, wherein a coating containing the photocatalytic material is disposed at the inner side of a package, placing the packed fresh meat between two electrodes of a plasma generating device, and performing the plasma sterilization under the condition of a high voltage electric field.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: October 22, 2019
    Assignee: NANJING AGRICULTURAL UNIVERSITY
    Inventors: Jianhao Zhang, Jiamei Wang, Hong Zhuang
  • Patent number: 9966852
    Abstract: A dual voltage output device includes a charging circuit and a control circuit. The charging circuit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, an inductor, a first capacitor and a second capacitor. The control circuit controls the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch so that a DC voltage source charges the inductor and the inductor charges the first capacitor and the second capacitor individually or together. Therefore, the capacitor provides a first voltage, and the second capacitor provides a second voltage.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: May 8, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Fu-Chuan Chen, Chih-Yuan Chen
  • Patent number: 9882483
    Abstract: A method of regulating voltage includes closing first and second switching devices during first and second periods in response to first and second signals, respectively. The first and second switching devices open and close to connect and disconnect first ends of first and second inductors of first and second phases of a voltage regulator to and from an input voltage, respectively. The method includes selectively generating one of the first and second signals when a third signal is in a first state; selectively setting the third signal to the first state based on a ramp voltage; resetting the ramp voltage to a predetermined reset voltage when the third signal transitions from a second state to the first state; maintaining the ramp voltage at the predetermined reset voltage for a predetermined ramp reset period after the resetting; and increasing the ramp voltage after the predetermined ramp reset period.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: January 30, 2018
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Serhii M. Zhak, Brett A. Miwa
  • Patent number: 9451566
    Abstract: Various embodiments include methods implemented on a wireless communication device for reducing interference during a tune-away from a first subscription to a second subscription when a transmitter remains tuned to the first subscription. The methods may include determining whether the first subscription will utilize the transmitter during the tune-away to the second subscription when the transmitter is operating in envelope tracking mode, and switching the transmitter from envelope tracking mode to average power tracking mode during the tune-away in response to determining that the first subscription will utilize the transmitter during the tune-away to the second subscription.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Ali Morshedi, Mihir Suvhir Anandpara, Partick Cantey, III
  • Patent number: 9059636
    Abstract: The present invention provides a series of DC-DC converter circuit designs, and DC-DC converters based on such circuit design, that provide high input-to-output voltage conversion. The converters include a resonant tank and a means for interrupting the tank current to produce a near zero-loss “hold” state wherein zero current and/or zero voltage switching is provided, while providing control over the amount of power transfer. A resonant DC-DC converter for high voltage step-up ratio in accordance with the circuit design includes: (a) a low voltage DC-AC converter, (b) a resonant tank, (c) a high voltage AC-DC converter, (d) a (i) common ground on an input and an output without use of a transformer and/or (ii) a single high voltage controllable switch within the resonant tank.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: June 16, 2015
    Inventors: Peter Waldemar Lehn, Luis Zubieta, Damien Frost
  • Patent number: 9041370
    Abstract: A charge pump regulator circuit includes a voltage controlled oscillator and a plurality of charge pumps. The voltage controlled oscillator has a plurality of inverter stages connected in series in a ring. A plurality of oscillating signals is generated from outputs of the inverter stages. Each oscillating signal has a frequency or amplitude or both that are variable dependent on a variable drive voltage. Each oscillating signal is phase shifted from a preceding oscillating signal. Each charge pump is connected to a corresponding one of the inverter stages to receive the oscillating signal produced by that inverter stage. Each charge pump outputs a voltage and current. The output of each charge pump is phase shifted from the outputs of other charge pumps. A combination of the currents thus produced is provided at about a voltage level to the load.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: May 26, 2015
    Assignee: Silanna Semiconductor U.S.A., Inc.
    Inventors: Stuart B. Molin, Perry Lou, Clint Kemerling
  • Publication number: 20150123638
    Abstract: A DCDC converter includes a transconductance amplifier, a comparator, a current driving component, an output impedance, a switch, a clamp resistor and a p-channel FET. The transconductance amplifier outputs a transconductance current and a switch control signal. The comparator has a two n-channel FET inputs forming a differential pair and outputs a compared signal. The current driving component generates an output current based on the compared signal. The output impedance component generates an output DC voltage based on the output current. The switch is between the two n-channel FETs and can open and close based on the switch control signal. The clamp resistor is arranged in series with the switch. The p-channel FET is in series with the clamp resistor and is controlled by the output DC voltage.
    Type: Application
    Filed: July 2, 2014
    Publication date: May 7, 2015
    Applicant: TEXAS INSTRUMENTS DEUTSCHLAND GMBH
    Inventors: Gerhard Thiele, Erich Bayer
  • Publication number: 20150097545
    Abstract: A circuit includes an output current circuit that employs a regulated voltage to provide an output voltage to drive a load current through an output load resistor. A load resistance sensor (LRS) senses the resistance of the output load resistor based on the output voltage and the load current. A controller provides a sense voltage control command to set the regulated voltage to an initial sense voltage during a sense mode. The initial sense voltage adjusts the output voltage of the output current circuit and enables the LRS to sense the resistance of the output load resistor at a given setting of the load current. The controller provides a clamp control command based on the sensed resistance of the output load resistor to set the regulated voltage to a fixed regulated voltage during an operation mode. The fixed regulated voltage enables the output current circuit to supply a predetermined maximum load current to the output load resistor at a predetermined minimum setting of the output voltage.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 9, 2015
    Inventors: Navin Venkata Kommaraju, Rahul Prakash, Chintan Trehan
  • Publication number: 20150054483
    Abstract: An adjustable load bank provides a load to a power source that is able to maintain a constant power and constant current as well as power factor control. The load bank utilizes various resistive and inductive elements that may be connected or disconnected as required. In operation, the load bank continuously monitors the voltage and current across the resistive and inductive elements and applies or subtracts elements as necessary via control signals in order to maintain the desired fixed total power dissipated by the load bank.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 26, 2015
    Applicant: Experium Technologies, LLC
    Inventor: Lance Palatini
  • Publication number: 20140375293
    Abstract: In a charge pump system using a capacitive voltage divider, or other feedback circuit requiring periodic refreshing, in order to refresh the circuit, system operations would typically need to be suspended in order to refresh the capacitors if charge leakage begins to affect the output level. This can lead to delay and power inefficiencies. To overcome this, two feedback circuits are used so that while one is active, the other can have its capacitors' state refreshed. By alternating the two networks, delay can be avoided and power use reduced.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Feng Pan, Trung Pham
  • Publication number: 20140253084
    Abstract: A power converter control circuit includes a feedback circuit and a pulse width modulation signal generating circuit for configuring a power stage circuit to provide power to a load. The feedback circuit generates a first gain signal and a second gain signal according to an output voltage sensing signal coupled with the load. The feedback circuit further generates a feedback signal according to the first gain signal and the second gain signal. The pulse width modulation signal generating circuit configures the operation of the power stage circuit according to the feedback signal and a reference signal. Moreover, the feedback circuit and the pulse width modulation signal generating circuit are configured on the same integrated circuit package.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 11, 2014
    Applicant: Richtek Technology Corporation
    Inventors: Ching-Jan CHEN, Shao-Hung LU, Jian-Rong HUANG
  • Publication number: 20140218002
    Abstract: The present invention provides a power system and controlling method thereof. The power system includes: pulse width modulation (PWM) power source, voltage detection unit, current detection unit and feedback signal generation unit. PWM power source receives external DC input, performs PWM on received external DC input, and supplies PWM output obtained through PWM from the DC output terminal to a device expecting power supply. Voltage detection unit detects voltage amplitude of PWM output. Current detection unit detects current amplitude of PWM output. Feedback signal generation unit generates feedback signal and supplies generated feedback signal to PWM power source. PWM power source adjusts the voltage amplitude and current amplitude of the PWM output based on the received feedback signal.
    Type: Application
    Filed: February 6, 2013
    Publication date: August 7, 2014
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Xueliang Yang
  • Publication number: 20140111178
    Abstract: An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode. During the envelope tracking mode, the envelope tracking power supply provides an envelope power supply signal using both the switching output and the analog output. During the transition mode, the envelope tracking power supply drives a voltage across the offset capacitive element from a first voltage to a second voltage, such that during a transition from the envelope tracking mode to the transition mode, the offset capacitive element has the first voltage, and during a transition from the transition mode to the average power tracking mode, the offset capacitive element has the second voltage.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Applicant: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Michael R. Kay, Mohammad Ahsanul Adeeb
  • Publication number: 20140097821
    Abstract: A control device for a DC-DC converter, which receives an input power and generates an output voltage, includes a first error amplifier for comparing a reference voltage signal and the output voltage to generate a feedback signal, a sampling and holding control circuit coupled to the first error amplifier for generating a reference current signal according to the feedback signal and an input current associated with the input power, a filter for receiving the input current associated with the input power and generating an average current value according to the input current, a second error amplifier coupled to the sampling and holding and the filter for comparing the reference current signal and the average current value before generating a control signal, and a switching control circuit coupled to the second error amplifier for generating a switching signal according to the control signal from the second error amplifier.
    Type: Application
    Filed: February 6, 2013
    Publication date: April 10, 2014
    Applicant: NATIONAL TAIWAN UNIVERSITY
    Inventors: YAOW-MING CHEN, YANG-LIN CHEN
  • Patent number: 8694817
    Abstract: A power supply according to various embodiments of the disclosure is configured to detect an event and, in response to the event, alternately supply power to a plurality of provided devices via a provided bus at a first current level or at a second current level, the second current level less than the first current level. Among other things, embodiments in this disclosure help allow additional devices to be used on a bus, even where the total power consumption of the devices would normally exceed a maximum defined by a bus architecture. Furthermore, various embodiments help allow a single gauge of wire to be used throughout a bus network (even where long lengths of wire are required) while still providing sufficient power to the devices connected to the bus.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: April 8, 2014
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Marc Hoffknecht, Javier Orlando Rojas, Liam John O'Hagan
  • Patent number: 8629630
    Abstract: A control circuit adapted to control a power converting circuit for stabilizing an output of the power converting circuit is provided. The control circuit includes a capacitor, a charging unit, a discharging unit, a feedback control unit, and a duty-cycle adjusting unit. The charging unit has a first current source coupled to the capacitor for charging the capacitor. The discharging unit is coupled to the capacitor for discharging the capacitor. The feedback control unit controls the charging unit to charge the capacitor according to a feedback signal which represents the output of the power converting circuit. The duty-cycle adjusting unit generates a control signal and adjusts a duty cycle of the control signal according to a voltage of the capacitor.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: January 14, 2014
    Assignee: Green Solution Technology Co., Ltd.
    Inventors: Shian-Sung Shiu, Chung-Che Yu, Li-Min Lee
  • Publication number: 20140009135
    Abstract: A charge pump regulator circuit includes a voltage controlled oscillator and a plurality of charge pumps. The voltage controlled oscillator has a plurality of inverter stages connected in series in a ring. A plurality of oscillating signals is generated from outputs of the inverter stages. Each oscillating signal has a frequency or amplitude or both that are variable dependent on a variable drive voltage. Each oscillating signal is phase shifted from a preceding oscillating signal. Each charge pump is connected to a corresponding one of the inverter stages to receive the oscillating signal produced by that inverter stage. Each charge pump outputs a voltage and current. The output of each charge pump is phase shifted from the outputs of other charge pumps. A combination of the currents thus produced is provided at about a voltage level to the load.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 9, 2014
    Applicant: IO SEMICONDUCTOR, INC.
    Inventors: Stuart B. Molin, Perry Lou, Clint Kemerling
  • Publication number: 20140009136
    Abstract: A charge pump regulator circuit includes an oscillator and one or more charge pumps. One or more oscillating signals are generated by the oscillator. Each oscillating signal has a frequency or amplitude or both that are variable dependent on a variable drive signal. For some embodiments having multiple oscillating signals, each oscillating signal is phase shifted from a preceding oscillating signal. For some embodiments having multiple charge pumps, each charge pump is connected to receive a corresponding one of the oscillating signals. Each charge pump outputs a voltage and current. For some embodiments having multiple charge pumps, the output of each charge pump is phase shifted from the outputs of other charge pumps. A combination of the currents thus produced is provided at about a voltage level to a load.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 9, 2014
    Inventors: Stuart B. Molin, Perry Lou, Clint Kemerling
  • Patent number: 8604765
    Abstract: A source-measure unit (SMU) may be implemented with digital control loops. The output voltage and output current may be measured with dedicated ADCs (analog-to-digital converters), and the readings obtained by the ADCs may be compared to a setpoint in a digital loop controller, which may produce an output to drive a DAC (digital-to-analog converter) to maintain the output voltage and/or output current at a desired setpoint. The digital loop controller may also digitally implement simulated resistance with high resolution, accuracy, and range, using Thévenin and Norton power supply models. Simulated resistor values may range from 10? to 10? for output currents in the 100 mA range, with a sub-200?? resolution. The range may be expanded up to 100 k? for output currents in the 10 ?A range. The Norton and Thévenin implementations may be combined, and a “pure resistance” mode may be created for simulating any desired resistance value.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: December 10, 2013
    Assignee: National Instruments Corporation
    Inventors: Christopher G. Regier, L. Rolando Ortega-Pohlenz
  • Publication number: 20130265026
    Abstract: A transmitting and receiving electrode system, and power transmission method using the same are provided. The transmitting and receiving electrode system includes: a voltage/current detection unit measuring a voltage and a current in real time while power is being transmitted between first and second electrodes; a controller calculating a variable element value based on the voltage and current values transferred from the voltage/current detection unit; and a variable element unit converting a variable element under the control of the controller to adjust an impedance of a power source.
    Type: Application
    Filed: April 24, 2012
    Publication date: October 10, 2013
    Applicant: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Youn-Tae KIM, Kun-Ho Park, Jang-Myoung Kim, Min-Joo Jeong, Chang-Hee Hyoung, Jung-Hwan Hwang, Sung-Weon Kang
  • Publication number: 20130257404
    Abstract: Apparatus, systems and methods for correcting data received from a power cable is presented. A method receives communication data from a near end of a cable that has near and far ends. The data is compared using hysteresis to a high threshold and/or a low threshold. The data is reset to produce corrected data by resetting the data to either a high value or a low value based on the comparing. For example, when the corrected data is high, the data is reset to a low value when the communication data crosses the low threshold and when the corrected data is low, the data is reset to a high value when the communication data crosses the high threshold. The corrected data can provide a power supply data needed so that it can more accurately provide a power through the cable to the far end of the cable.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: Checkpoint Systems, Inc.
    Inventor: Michael T. McMahon
  • Publication number: 20130235017
    Abstract: Disclosed is a power supply unit including a DC-DC converter including an output terminal and resistor coupling terminal and an external resistor coupled to the resistor coupling terminal, where the DC-DC converter includes a first power generation unit which outputs a predetermined current to the output terminal, and a sensing circuit unit that includes a sensing resistor located between the first power generation unit and the output terminal and stops an operation of the first power generation unit depending on a current value flowing in the sensing resistor. A power supply unit and an organic light emitting display including the power supply unit include a sensing circuit unit that stops operation of the power supply unit to prevent an additional damage when an abnormal current occurs.
    Type: Application
    Filed: June 28, 2012
    Publication date: September 12, 2013
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventor: Sung-Cheon Park
  • Patent number: 8516278
    Abstract: A method and apparatus control power consumption in a portable terminal by cutting the direct current (DC) bias voltage. The power consumption control apparatus of a portable terminal is connected to the processors. The apparatus includes an oscillator, an inverter, and a DC bias voltage cutting unit. The oscillator creates signals to control the portable terminal to be operated in a sleep mode or a standby mode. The inverter receives the signals from the oscillator and outputs inverted signals to the processors. The DC bias voltage cutting unit cuts a DC bias voltage that is derived on a feedback line between an input port and an output port of the inverter, from the signals created by the oscillator. The apparatus and method can allow the portable terminal to reduce the power consumption when the processors are driven.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: August 20, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Hyung Gon Kim
  • Publication number: 20130193944
    Abstract: According to one embodiment, a voltage generator includes a step-up circuit and a limiter circuit. The step-up circuit outputs a first voltage to a first node. The limiter circuit includes first and second resistive elements, first and second capacitive elements, a switch element, and a comparator. The first resistive element is between the first node and a second node. The second resistive element is connected to the second node. The first capacitive element is between the first and second nodes. The switch element connects the second capacitive element to the second node at the same time that the first node is connected to a load. The comparator compares the potential at the second node with a reference potential.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 1, 2013
    Inventor: Yoshinao SUZUKI
  • Patent number: 8497670
    Abstract: A charge pump regulator circuit includes a voltage controlled oscillator and a plurality of charge pumps. The voltage controlled oscillator has a plurality of inverter stages connected in series in a ring. A plurality of oscillating signals is generated from outputs of the inverter stages. Each oscillating signal has a frequency or amplitude or both that are variable dependent on a variable drive voltage. Each oscillating signal is phase shifted from a preceding oscillating signal. Each charge pump is connected to a corresponding one of the inverter stages to receive the oscillating signal produced by that inverter stage. Each charge pump outputs a voltage and current. The output of each charge pump is phase shifted from the outputs of other charge pumps. A combination of the currents thus produced is provided at about a voltage level to the load.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: July 30, 2013
    Assignee: IO Semiconductor, Inc.
    Inventors: Stuart B. Molin, Perry Lou, Clint Kemerling
  • Publication number: 20130176012
    Abstract: Methods and apparatus for an integrated circuit that includes a supply voltage transient detection module to activate a hold signal that causes the output to remain in its present state. In one embodiment, the output remains in that state until the supply voltage returns to a normal operating range and the hold signal transitions to an inactive state.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 11, 2013
    Applicant: ALLEGRO MICROSYSTEMS, INC.
    Inventors: Jeff Eagen, Devon Fernandez, P. Karl Scheller
  • Publication number: 20130141071
    Abstract: A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 6, 2013
    Inventors: Matteo Conta, Lorenzo Crespi
  • Patent number: 8426924
    Abstract: An area efficient distributed device for integrated voltage regulators comprising at least one filler cell coupled between a pair of PADS on I/O rail of a chip and at least one additional filler cell having small size replica of said device is coupled to said I/O rails for distributing replicas of said device on the periphery of said chip. The device is coupled as small size replica on the lower portion of said second filler cell for distributing said device on the periphery of said chip and providing maximal area utilization.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: April 23, 2013
    Assignee: STMicroelectronics Pvt. Ltd.
    Inventors: Joshipura Jwalant, Nitin Bansal, Amit Katyal, Massimiliano Picca
  • Patent number: 8423805
    Abstract: A portable electronic apparatus is connected to a power supply device via a transmission line, and it includes a designated connector, a charge control circuit, and a judgment circuit. The designated connector includes five terminals respectively corresponding to five pins of a USB connector of the power supply device. When the power supply device is connected to the portable electronic apparatus, the first terminal of the designated connector is logic high, the fourth terminal of the designated connector is logic high, and the third terminal of the designated connector is logic high after pulling up the voltage level of the second terminal, the judgment circuit pulls down the voltage level of the third terminal and detects the voltage level of the third terminal so as to generate a determining result for determining a type of the power supply device.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 16, 2013
    Assignee: HTC Corporation
    Inventors: Chih-Hung Li, Yung-Hsien Kuo
  • Patent number: 8412479
    Abstract: Memory power estimation by means of calibrated weights and activity counters are generally presented. In this regard, in one embodiment, a memory power is introduced to read a value from a memory activity counter, to determine a memory power estimation based at least in part on the value and a calibration, and to store the memory power estimation to a register. Other embodiments are also described and claimed.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: April 2, 2013
    Assignee: Intel Corporation
    Inventors: Howard S. David, Eugene Gorbatov, Ulf R. Hanebutte, Minh Le, Rahul Khanna
  • Patent number: 8395368
    Abstract: The present invention discloses an adaptive voltage position DC-DC regulator and the method thereof, the regulator comprising a main circuit and a control circuit which includes a sensing unit, a feedback unit, a comparing unit, a PWM generator and a driver. The regulator realizes the adaptive voltage position control with simple internal circuit and fewer pins.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: March 12, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventor: Qian Ouyang
  • Publication number: 20130057237
    Abstract: The present invention discloses a multi-phase switching regulator and a droop circuit therefor. The droop circuit includes: multiple first resistors, which are coupled to corresponding phase nodes respectively to sense current through the phase nodes; a second resistor, which is coupled to the multiple first resistors; an error amplifier circuit, which has an inverting input end and a non-inverting input end, wherein the inverting input end is coupled to the second resistor and an output end of the error amplifier circuit, and the non-inverting input end is coupled to an output node; and a droop capacitor, which is coupled between the second resistor and the output node; wherein the droop circuit provides the droop signal according to a voltage drop across the second resistor or current through the second resistor.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 7, 2013
    Inventors: An-Tung Chen, Yuan-Wen Hsiao, Yi-Cheng Wan
  • Publication number: 20130027006
    Abstract: A boost power converter system according to one embodiment includes an input voltage high-side node; an inductor coupled to the input voltage high-side node at a first terminal of the inductor; a power switch coupled to the inductor at a second terminal of the inductor; a drive circuit configured to control the power switch such that the boost power converter system operates in a discontinuous conduction mode when a load current drops below a critical conduction threshold; and a damping switch configured to enable current flow from the power switch at the second terminal of the inductor to the input voltage high-side node, wherein the damping switch is closed when the power switch is open and the damping switch is opened when the power switch is closed.
    Type: Application
    Filed: July 28, 2011
    Publication date: January 31, 2013
    Inventors: Rendon Holloway, Adrian Ong, Howard Hou
  • Patent number: 8237424
    Abstract: A system comprises a voltage regulator operably coupled to an external component, a voltage regulator reset circuit and at least one functional element supplied with a voltage by the voltage regulator. The voltage regulator reset circuit is arranged to repetitively reset the voltage regulator upon disconnection of the external component.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: August 7, 2012
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Arlette Marty-Blavier, Philippe Lance, Stephan Ollitrault, Yean Ling Teo
  • Publication number: 20120146611
    Abstract: Systems and methods for providing a boost converter with an improved stability are disclosed. A sample and hold circuit is connected to the output of the boost converter. That sample and hold circuit holds the output voltage before the main switch of the boost converter turns ON and holds the voltage while the main switch is ON. Thus a high frequency oscillation can be eliminated, an increased control bandwidth without stability problems can be achieved, and no complicated additional circuit is required.
    Type: Application
    Filed: December 30, 2010
    Publication date: June 14, 2012
    Inventor: Hidenori Kobayashi
  • Publication number: 20120139478
    Abstract: A voltage conversion circuit for a charging device includes a voltage-stabilizing circuit and a switching circuit. The voltage-stabilizing circuit includes a voltage stabilizer circuit and a feedback resistor, the voltage stabilizer circuit comprises an input pin, an output pin, and a feedback pin. The switching circuit includes a switch and at least two divider resistors, the switch comprises at least two data input terminals, a data output terminal, and two control terminals. The input pin is connected to a power source, and the feedback resistor is connected between the feedback pin and ground. The data input terminals are respectively connected to the output pin through one of the divider resistors, the data output terminal is connected between the feedback pin and the feedback resistor, the two control terminals are capable of receiving control signals to control the data output terminal to selectively connect to one of the data input terminals.
    Type: Application
    Filed: January 21, 2011
    Publication date: June 7, 2012
    Applicants: CHI MEI COMMUNICATION SYSTEMS, INC., SHENZHEN FUTAIHONG PRECISION INDUSTRY CO., LTD.
    Inventor: HAI-ZHOU WU
  • Patent number: 8193800
    Abstract: A method and system for reducing the noise level of a power supply system with the implementation of a voltage controlled decoupling capacitor in an electrical circuit. Voltage variations of the power supply caused by switching currents are detected by a voltage sensor control circuit. The voltage sensor circuit compares a stable reference voltage with the varying voltage level of the power supply in order to generate a sensor control voltage. When applied to the decoupling capacitor, the control voltage adjusts the capacitance of the voltage controlled capacitor. The adjusted capacitance allows the voltage controlled decoupling capacitor to compensate for the effects of the voltage variations by supplying an increased quantity of charge to various circuit components. Thus, the voltage controlled capacitor is able to efficiently reduce noise within the power supply system.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: June 5, 2012
    Assignee: International Business Machines Corporation
    Inventor: Yaping Zhou
  • Publication number: 20120126775
    Abstract: A switching power converter including an upper-bridge switch, a lower-bridge switch, an impedance circuit, a first control circuit, a second control circuit and a logic circuit is provided. The impedance circuit generates an output voltage and a sensing current according to a conductive state of the upper-bridge switch and the lower-bridge switch. The first control circuit generates a first pulse signal according to the output voltage. The second control circuit has a first mode and a second mode for generating a second pulse signal and a third pulse signal individually. Furthermore, the second control circuit uses different threshold values in different modes to determine whether to switch the mode thereof, so as to form a hysteretic effect in mode switching. The logic circuit controls the upper-bridge switch by the first pulse signal, and controls the lower-bridge switch by the second pulse signal or the third pulse signal.
    Type: Application
    Filed: February 7, 2011
    Publication date: May 24, 2012
    Applicant: UPI SEMICONDUCTOR CORP.
    Inventors: Shih-Chieh Hung, Hua-Chiang Huang, Jiun-Chiang Chen
  • Publication number: 20120112724
    Abstract: A charge pump circuit which steps down an input voltage inputted from an input terminal and outputs it as a step-down output voltage from a step-down output terminal, and steps up the input voltage and outputs it as a step-up output voltage from a step-up output terminal, includes: a voltage conversion circuit having a flying capacitor, a step-down output capacitor, a step-up output capacitor, and a plurality of switches, wherein the flying capacitor, the step-down output capacitor, the step-up output capacitor, and the switches are connected, and the voltage conversion circuit is capable of switching connection states by switching each on/off state of the switches; an output voltage detection circuit unit which makes a comparison of a voltage between the step-down output voltage and a first predetermined voltage, and makes a comparison of a voltage between the step-up output voltage and a second predetermined voltage, and produces and outputs each signal indicating each result of the comparisons; and a contr
    Type: Application
    Filed: July 22, 2010
    Publication date: May 10, 2012
    Applicant: Ricoh Company, Ltd.
    Inventor: Junji Nishida
  • Publication number: 20120112723
    Abstract: The improved DC-DC converter apparatus includes a primary side circuit and a secondary side circuit that is galvanically isolated from the primary. The primary side induces a voltage in the secondary side that provides an output voltage for driving POLs. A controller in the primary senses a reflected output voltage signal that is coupled from the secondary and is proportional to the secondary output voltage with respect to a voltage regulation point determined by either a voltage divider circuit or the zener voltage in the secondary. The voltage regulation point is established by wide-tolerance electrical components, such as a zener diode, a resistor, or a combination, connected in the coupling device circuit.
    Type: Application
    Filed: March 24, 2011
    Publication date: May 10, 2012
    Inventors: Jin He, Jeffrey Boylan, Carl Wildrick
  • Publication number: 20120112722
    Abstract: A power supply circuit includes a first-stage circuit and a second-stage circuit. The first-stage circuit is used for converting an input voltage into a DC voltage. The second-stage circuit includes a main power conversion circuit for converting the DC voltage into a first output voltage, a first standby power conversion circuit for converting the DC voltage into a second output voltage, a feedback circuit for generating a feedback signal, a second standby power conversion circuit and a power distribution circuit. The magnitude of the second output voltage is adjusted by the first standby power conversion circuit according to the feedback signal. The second standby power conversion circuit is used for converting the first output voltage or the second output voltage into a standby voltage. The power distribution circuit is used for selectively delivering the first output voltage or the second output voltage to the second standby power conversion circuit.
    Type: Application
    Filed: March 18, 2011
    Publication date: May 10, 2012
    Applicant: DELTA ELECTRONICS (THAILAND) PUBLIC CO., LTD.
    Inventor: Sae-Ueng Sakda
  • Publication number: 20120056607
    Abstract: A power regulator, power control system and the method thereof are provided. A detecting device receives a feedback signal from a resistive load device, and outputs a control signal, which could be a voltage or a current. While receiving the control signal, the power regulator outputs a drive voltage in a proportional way. In the proportional way, full power drive voltage is outputted in a continuous output time period and is stopped outputting in a continuous non-output time period. The resistive load device receives the drive voltage and then outputs the feedback signal to the detecting device. Similarly, in the proportional way, the full power drive voltage is outputted in the continuous output time period and is stopped outputting in the continuous non-output time period. Thus, it is able to decrease the amount of harmonic waves.
    Type: Application
    Filed: September 8, 2010
    Publication date: March 8, 2012
    Inventor: Chin-Yi Lin
  • Publication number: 20120049830
    Abstract: A DC-DC converter includes a power conversion portion including a switching element; a first resistor having one terminal electrically connected to the power conversion portion; a second resistor having one terminal electrically connected to the other terminal of the first resistor; a third resistor having one terminal electrically connected to the other terminal of the first resistor; a constant current supply electrically connected to the other terminal of the third resistor; and a control circuit electrically connected to the other terminal of the third resistor and configured to control the switching element. Resistance R1 of the first resistor, resistance R2 of the second resistor, resistance R3 of the third resistor, a reference current Iref output from the constant current supply, and an output voltage Vout output from the power conversion portion satisfy a following formula: { ( 1 + R 3 R 2 ) · R 1 + R 3 } · I ref > - V out .
    Type: Application
    Filed: August 23, 2011
    Publication date: March 1, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Kazunori Watanabe
  • Publication number: 20120038342
    Abstract: A voltage regulator for a merchandise display security device provides an appropriate operating voltage through a power cable electrically connected between an alarm sensor and an item of merchandise. The voltage regulator utilizes a feedback signal from a power conversion chip and data from a microprocessor look-up table to adjust the input power to the merchandise. The look-up table stores appropriate operating voltage requirements for each power cable used for different types and brands of merchandise. The type and brand of merchandise is identified by the resistance of the power cable and the feedback signal is modified continuously to maintain power to the merchandise at an appropriate operating voltage.
    Type: Application
    Filed: August 11, 2010
    Publication date: February 16, 2012
    Applicant: INVUE SECURITY PRODUCTS INC.
    Inventors: William M. Warren, David P. Christianson
  • Publication number: 20120032662
    Abstract: Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage.
    Type: Application
    Filed: October 14, 2011
    Publication date: February 9, 2012
    Applicant: GEORGIA TECH RESEARCH CORPORATION
    Inventor: Deepakraj Divan
  • Publication number: 20120032653
    Abstract: Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage.
    Type: Application
    Filed: October 17, 2011
    Publication date: February 9, 2012
    Applicant: GEORGIA TECH RESEARCH CORPORATION
    Inventor: Deepakraj Divan
  • Publication number: 20120032663
    Abstract: Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage.
    Type: Application
    Filed: October 17, 2011
    Publication date: February 9, 2012
    Applicant: GEORGIA TECH RESEARCH CORPORATION
    Inventor: Deepakraj Divan