Including Ramp Generator Or Controlled Capacitor Charging Patents (Class 323/242)
  • Patent number: 11221259
    Abstract: A temperature computing parameter providing circuit, configured to generate sensing voltage values and calibrated voltage values as temperature computing parameters for a target electronic device, including: a parameter computing circuit, configured to compute a reference voltage, which is a cross voltage of a reference resistor coupled to the target electronic device in series, to generate a reference voltage value, and to compute the sensing voltage, which is a cross voltage of the target electronic device, to generate the sensing voltage value; a reference temperature sensing circuit, configured to sense a current reference temperature of the reference resistor; and a computing circuit, configured to calibrate the reference voltage value to generate the calibrated voltage value according to a calibrating function and the current reference temperature. The calibrating function corresponds to a resistance-temperature variation function.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: January 11, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shin-Hao Chen, Yi-Chang Tu
  • Patent number: 10798798
    Abstract: A lighting control device is provided which includes a microcontroller, at least one wireless transceiver, at least one dimmer, one or more lighting terminals powered by the at least one dimmer, at least one environmental sensor, and at least one input device. In operation, the microcontroller obtains environmental data from the at least one environmental sensor, obtains input data from the at least one input device, transmits the environmental data and the input data to an external server, obtains a lighting operating schedule based on the environmental data and the input data from the external server, and executes the lighting operating schedule from the external server by controlling one or more smart bulbs via the at least one wireless transceiver and controlling the electrical current output to lighting terminals.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: October 6, 2020
    Assignee: Lime Green Lighting, LLC
    Inventor: Jonathan Richard Phillips
  • Patent number: 10686377
    Abstract: There is presented a boost converter and an associated method for starting the boost converter. The boost converter includes an input terminal for receiving an input voltage, an output terminal for providing an output voltage, a low-side power switch and a high-side power switch coupled at a switching node, and a voltage regulator coupled to the high-side power switch. The boost converter is also provided with a controller for operating the boost converter in a start-up phase. In the start-up phase the controller controls the boost converter to generate an intermediate voltage and increase the intermediate voltage to a predetermined value. The intermediate voltage is then provided to the voltage regulator to obtain a drive voltage. The high side power switch is then driven to increase the output voltage linearly up to a start-up voltage.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: June 16, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Edward Lu, Stella Su, Yuan Wen Hsiao, Der-Ju Hung
  • Patent number: 10224811
    Abstract: Methods and apparatus for reducing electromagnetic interference in a power converter using phase hopping in conjunction with pulse width modulation are disclosed. An example power converter includes an input voltage to, when a control switching device receives a first voltage, increase an output voltage; and when the control switching device receives a second voltage, decrease the output voltage. The example power converter further includes a phase hopping generator to generate a phase varying signal corresponding to two or more phases, the phase varying signal corresponding to a reference voltage; and output the phase varying signal to control the control switching device.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: March 5, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rahmi Hezar, Nikolaus Klemmer
  • Patent number: 10200051
    Abstract: One example includes a pipelined analog-to-digital converter device. The pipelined analog-to-digital converter device includes a capacitive digital-to-analog converter, a first analog-to-digital converter, and a second analog-to-digital converter. The capacitive digital-to-analog converter includes a capacitor comprised of a top plate and a bottom plate, the capacitive digital-to-analog converter sampling an analog input signal applied to the pipelined analog-to-digital converter device while the capacitor is grounded, holding the sampled analog input while the top plate is floated, and outputting a residue voltage. The second analog-to-digital converter is coupled to the top plate of the capacitor, the second analog-to-digital converter producing a second digital representation of voltage on the top plate of the capacitor after the top plate is floated, wherein the second digital representation represents fine bits produced by the first stage of the pipelined analog-to-digital converter device.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: February 5, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sabu Paul, Raghu Nandan Srinivasa
  • Patent number: 10050615
    Abstract: An over-voltage protection circuit for a transistor switch has an error detecting circuit, a dummy load circuit and a driving circuit. The error detecting circuit has a first input terminal; and a second input terminal configured to receive a reference signal. The dummy load circuit is configured to establish a conductive path between the output terminal of the transistor switch and ground. The driving circuit is configured to increase the on-resistance of the transistor switch if the voltage difference between the second terminal of the error detecting circuit and the first terminal of the error detecting circuit is smaller than a calculated value.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: August 14, 2018
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Chandler Chen
  • Patent number: 9762123
    Abstract: A boost converter circuit able to sense current comprises an inductor connected with a power source; an active switch; a passive switch; a capacitor connected with one end of the passive switch, which is not connected with the active switch; a center-tapped current transformation element; and a signal rectification unit. The center-tapped current transformation element includes a primary winding and a secondary winding. Two ends of the primary winding are respectively connected with the active switch and the passive switch. The primary winding is connected with the inductor through a tapped terminal. The secondary winding is magnetically induced by the primary winding to generate a magnetic induction signal while the primary winding receives an inductor current. The signal rectification unit is connected with the secondary winding, receiving the magnetic induction signal and rectifying the magnetic induction signal to generate a sensed current signal corresponding to the inductor current.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: September 12, 2017
    Assignee: SEA SONIC ELECTRONICS CO., LTD.
    Inventors: Pao-Tsun Lin, Ten-Chun Chen
  • Patent number: 9559613
    Abstract: In accordance with an embodiment, switch driver includes a first switch driver configured to be coupled to a control node of a first switch, a second driver configured to be coupled to a control node of a second switch, and a first terminal and a second terminal configured to be couple to a boot capacitor. The first terminal is coupled between a boot input of the first switch driver and the second terminal is configured to be coupled to outputs of the first switch and the second switch. The switch driver further includes a voltage measurement circuit coupled to the first terminal and the second terminal, and a control circuit configured to activate the second switch driver when the voltage measurement circuit indicates that a voltage across boot capacitor is below a first threshold.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: January 31, 2017
    Assignee: Infineon Technologies AG
    Inventors: Jens Ejury, Giuseppe Bernacchia, Henrik Hassander
  • Patent number: 9425691
    Abstract: A DC-DC converter includes an input terminal Pin receiving an voltage input, switching circuits connected in parallel between the input terminal Pin and ground, an output terminal Pout from which converted voltage is output, and a controller that turns the switching circuits on in a predetermined cycle by inputting, into each of the switching circuits, a control signal that turns the switching circuits on individually.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 23, 2016
    Assignee: CYPRESS SEMICONDUCTOR CORPORATION
    Inventor: Toru Miyamae
  • Patent number: 9337735
    Abstract: A DC/DC converter is disclosed. The DC/DC converter includes a first heavy-load electronic switch and a second heavy-load electronic switch connected in series between an input terminal and ground at a first output portion, a third light-load electronic switch and a fourth light-load electronic switch connected in series between the input terminal and ground at a second output portion, an output circuit, an output current measurement circuit, and a control circuit. The output circuit includes an inductor connected to the first and second output portions. The output current measurement circuit measures an output current. The control circuit, in response to an output of the output current measurement circuit, selects a combination of the first and second heavy-load electronic switches during a heavy load state, and selects a combination of the third and fourth light-load electronic switch during a light load state.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: May 10, 2016
    Assignee: LENOVO (SINGAPORE) PTE LTD
    Inventor: Shigefumi Odaohhara
  • Patent number: 9252674
    Abstract: A controller of the power converter according to the present invention comprises a gate driver. The gate driver generates a gate-drive signal. The gate-drive signal is coupled to drive a power transistor to switch a transformer of the power converter for regulating an output of the power converter. The gate driver has a charge-pump circuit for charging pump a voltage level of the gate-drive signal. Therefore, the gate-drive signal can fully turn on the power transistor.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: February 2, 2016
    Assignee: System General Corp.
    Inventors: Ta-Yung Yang, Chin-Yen Lin, Jung-Sheng Chen, Li Lin
  • Patent number: 8988050
    Abstract: A two-wire load control device (such as, a dimmer switch or an electronic switch) for controlling the power delivered from an AC power source to an electrical load includes a controllably conductive device for controlling the power to the load, a microprocessor operable to generate a control signal that is representative of whether the load should be controlled on or off, a capacitor operable to produce a supply voltage for powering the microprocessor, a power supply that charges the capacitor when the controllably conductive device is non-conductive, and a control circuit that receives the control signal from the microprocessor. The control circuit is operatively coupled to the controllably conductive device for maintaining the controllably conductive device non-conductive after the beginning of each half-cycle until the magnitude of the supply voltage exceeds a predetermined threshold.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: March 24, 2015
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Robert C. Newman, Jr., Daniel F. Carmen
  • Patent number: 8937471
    Abstract: A discharging circuit includes a filter unit connected between the input lines of a commercial AC power supply, a switch whose operations are controlled by the filter unit; and a discharging unit which discharges voltage of the capacitance element when the switch unit is turned on.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: January 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junya Kobayashi, Minoru Hayasaki
  • Patent number: 8901912
    Abstract: A bootstrap capacitor detecting circuit includes a current source, for providing a discharging current; a first switch, for conducting connection between a system voltage and a bootstrap voltage node according to a power-on-reset signal, to charge the bootstrap voltage node; a second switch, for conducting connection between a current source and the bootstrap voltage node according to the power-on-reset signal, to discharge the bootstrap voltage node; and a detecting unit, for determining whether a bootstrap capacitor is connected normally according to a bootstrap voltage of the bootstrap voltage node after the current source discharges the bootstrap voltage node.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: December 2, 2014
    Assignee: Anpec Electronics Corporation
    Inventors: Tsung-Kuan Lee, Chih-Yuan Chen
  • Patent number: 8779748
    Abstract: An error amplification circuit includes an integrated circuit and a phase compensation capacitor. The integrated circuit includes an error amplifier to amplify a difference between a predetermined reference voltage and an input feedback voltage for output; a current generator circuit to generate a bias current for supply to the error amplifier; a phase compensation resistor; a bias-current control terminal; and a phase compensation terminal connected to an output terminal of the error amplifier via the phase compensation resistor. The phase compensation capacitor is connected to the phase compensation terminal, the phase compensation capacitor being provided outside the integrated circuit.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: July 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Takashi Gotoh
  • Patent number: 8605845
    Abstract: The present invention discloses an adaptive phase-shifted synchronization clock generation circuit and a method for generating phase-shifted synchronization clock. The adaptive phase-shifted synchronization clock generation circuit includes: a current source generating a current which flows through a node to generate a node voltage on the node; a reverse-proportional voltage generator coupled to the node for generating a voltage which is reverse-proportional to the node voltage; a ramp generator receiving a synchronization input signal and generating a ramp signal; a comparator comparing the reverse-proportional voltage to the ramp signal; and a pulse generator for generating a clock signal according to an output from the comparator.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: December 10, 2013
    Assignee: Richtek Technology Corporation
    Inventors: Isaac Chen, An-Tung Chen
  • Patent number: 8587265
    Abstract: A DC-DC converter control circuit includes: a slope signal generation circuit that generates a reference voltage by superimposing a slope voltage onto a standard voltage; a comparator that performs comparison of the reference voltage with an output voltage and generates a signal according to a result of the comparison; an oscillator that generates a pulse signal with a substantially constant cycle; and a control signal generation circuit that generates a control signal that turns on a switch based on a comparator output signal and turns off the switch based on the pulse signal.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: November 19, 2013
    Assignee: Spansion LLC
    Inventors: Eiji Nishimori, Yoshihiko Matsuo, Osamu Takahashi, Takeshi Kimura
  • Patent number: 8587275
    Abstract: Circuitry and method for providing a signal indicative of instances of conduction of average inductor current in a DC-to-DC voltage converter. Such signal identifies a time when the instantaneous average current being conducted by the inductor in a DC-to-DC voltage converter can be measured by providing a signal edge approximately halfway through one of the increasing and decreasing current conduction intervals of the inductor.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: November 19, 2013
    Assignee: National Semiconductor Corporation
    Inventors: Faruk Jose Nome Silva, Karen Chan
  • Patent number: 8564258
    Abstract: A first pump circuit generates a first voltage for decreasing the distance between primary electrodes. The first voltage is limited to a predetermined limit by a first limiter circuit. A second pump circuit generates a second voltage for keeping the distance between the primary electrodes constant. A third pump circuit generates the second voltage and has a supplying capacity smaller than the first one. The second voltage is limited by second and third limiter circuits. A ripple capacitor is charged up to the second voltage by the second pump circuit and the second limiter circuit within a period of time the first voltage is being generated. When a supplying voltage of the first pump circuit reaches to the first voltage, and a deformation stops, the second voltage is supplied by the third pump circuit and the third limiter circuit instead of the second pump circuit and the second limiter circuit.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: October 22, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Atsushi Suzuki
  • Patent number: 8508196
    Abstract: Provided is a switching regulator capable of performing stable start-up with a soft-start operation without causing excessive extension of a soft-start time period. In a start-up period, a voltage approximating a feedback voltage (FB) is provided as an initial value of a soft-start reference voltage. The feedback voltage (FB) and the soft-start reference voltage become substantially equal to each other at a moment when the start-up is completed, to thereby realize a smooth transition of an operating state from the start-up to normal control.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: August 13, 2013
    Assignee: Seiko Instruments Inc.
    Inventor: Michiyasu Deguchi
  • Patent number: 8488342
    Abstract: System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: July 16, 2013
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yaming Cao, Xiaomin Huang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 8432712
    Abstract: Disclosed are apparatus and methodology for providing a capacitive voltage divider configured to reduce a relatively high level alternating current (AC) to a lower level direct current (DC). The apparatus provides a series of capacitors and diodes configured for series charging of the capacitors and parallel discharge thereof by way of a single switching element. In operation, the capacitor series is charged during the negative half cycle of the AC source and then discharged during the positive half cycle thereof.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: April 30, 2013
    Assignee: Itron, Inc.
    Inventor: Vladimir Borisov
  • Patent number: 8432146
    Abstract: Rather than operating in asynchronous mode during turn-on ramps, a switching power regulator system may be configured to synthesize a digital waveform, which may protect against a pre-bias condition and maintain the desired ramp-up time and rate. The desired turn-on ramp may be generated digitally by counter logic, beginning with an initial value and incrementing at a programmed rate until a digital value equivalent to the desired output voltage is reached. When a pre-bias condition is not present, the output of the digital ramp generator may control a digital-to-analog converter (DAC), which may be configured to generate the reference voltage for the power regulator. To correct for a pre-bias condition, the pre-bias output of the power regulator may be measured prior to turn-on, using an analog-to-digital converter. The digital pre-bias value may be used to control the DAC until the value of the digital waveform generated by the ramp generator reaches the pre-bias value.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: April 30, 2013
    Assignee: Zilker Labs, Inc.
    Inventor: Kenneth W. Fernald
  • Patent number: 8395347
    Abstract: In an induction motor group control system, magnetic energy recovery switches (3) are connected in series to an induction motor (2) directly driven by a commercial power supply, and a plurality of induction motor control devices (10) enabling voltage control and reactive power control of the induction motor 2 are employed to control generation of reactive power so as to maximize a power factor of the entire plurality of AC loads including the induction motor or compensate variations in voltage of an AC power supply (1).
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: March 12, 2013
    Inventors: Kazuhiko Fukutani, Hideo Narisawa, Ryuichi Shimada, Takanori Isobe, Tadayuki Kitahara
  • Patent number: 8378656
    Abstract: A photovoltaic (PV) energy system includes a pulsed bus defined by a non-zero average value voltage that is proportional to a rectified utility grid AC supply voltage. The PV energy system also includes a plurality of PV modules, each PV module including a bucking circuit configured to convert a corresponding PV voltage into a pulsing current, wherein the pulsating bus is configured to sum the pulsing currents produced via the plurality of PV modules such that a resultant pulsing current is injected into the pulsating bus in phase with the non-zero average value voltage. A current unfolding circuit is configured to control the amount of AC current injected into the utility grid in response to the resultant pulsing current.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: February 19, 2013
    Assignee: General Electric Company
    Inventors: Michael Andrew de Rooij, John Stanley Glaser, Oliver Gerhard Mayer, Said Farouk Said El-Barbari
  • Patent number: 8368475
    Abstract: A first capacitor is arranged such that the electric potential at a first terminal is fixed. A first discharging circuit discharges the first capacitor at a timing that corresponds to a cyclic synchronization signal received from an external circuit. A first comparator compares the voltage at a second terminal of the first capacitor with a predetermined threshold voltage, and generate a judgment signal that corresponds to the comparison result. A charging circuit generates a charging current the current value of which is adjusted according to the level of the judgment signal at a timing that corresponds to the synchronization signal, and supplies the charging current thus generated to the first capacitor.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: February 5, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Kenji Nakada, Nobuaki Umeki
  • Patent number: 8350542
    Abstract: A stepwise voltage ramp generator includes a tank capacitor, a terminal of which is coupled to a reference potential to be charged with a voltage ramp. A transistor couples the tank capacitor to a supply line. A diode-connected transistor, biased with a bias current is coupled to the transistor to form a current mirror. A by-pass switch is electrically coupled in parallel to the diode-connected transistor, and is controlled by a PWM timing signal, the duty-cycle of which determines a mean slope of the generated voltage ramp.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: January 8, 2013
    Assignee: STMicroelectronics S.R.L.
    Inventors: Diego Armaroli, Davide Betta, Marco Ferrari, Roberto Trabattoni
  • Patent number: 8188719
    Abstract: Provided is a voltage regulator capable of stable operation under a light load so as to cover a wide range of load capacitances. The voltage regulator includes a circuit for charging a phase compensation capacitor for the voltage regulator, and a zero due to a resistor (104) and a capacitor (106) appears at low frequency.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: May 29, 2012
    Assignee: Seiko Instruments Inc.
    Inventor: Minoru Sudou
  • Patent number: 8159197
    Abstract: A circuit and method are proposed for constant on-time control for an interleaved multiphase voltage regulator, which monitor the channel currents of all the channels of the interleaved multiphase voltage regulator to select one from the channels to drive and so achieve interleaved phase operation.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: April 17, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Chung-Sheng Cheng, Jian-Rong Huang, Chung-Shu Li
  • Publication number: 20120068672
    Abstract: A first pump circuit generates a first voltage for decreasing the distance between primary electrodes. The first voltage is limited to a predetermined limit by a first limiter circuit. A second pump circuit generates a second voltage for keeping the distance between the primary electrodes constant. A third pump circuit generates the second voltage and has a supplying capacity smaller than the first one. The second voltage is limited by second and third limiter circuits. A ripple capacitor is charged up to the second voltage by the second pump circuit and the second limiter circuit within a period of time the first voltage is being generated. When a supplying voltage of the first pump circuit reaches to the first voltage, and a deformation stops, the second voltage is supplied by the third pump circuit and the third limiter circuit instead of the second pump circuit and the second limiter circuit.
    Type: Application
    Filed: November 28, 2011
    Publication date: March 22, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Atsushi SUZUKI
  • Patent number: 8080949
    Abstract: The present invention relates to temperature compensation of HID lamps in automobiles. The invention concerns the manner in which the temperature of the HID lamp is accounted for in order to drive the lamp is at appropriate power from hot to cold conditions. In the present invention, the voltage across a capacitor in the temperature compensation circuit is sensed and used as a command signal to anticipate lamp temperature, and accordingly the reference power to the HID lamp is modulated depending on the temperature of the lamp. In the present invention, the lamp is driven with a higher power setting when the lamp is cold and with lower power setting when hot. This adaptive generation of reference power setting depending on the temperature of the lamp is implemented using the voltage across a capacitor in the temperature compensation circuit.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: December 20, 2011
    Assignee: The Hong Kong Polytechnic University
    Inventors: Ka Wai Eric Cheng, Bangalore Prabhakar Divakar, Dao Hong Wang, Chow Norbert Cheung
  • Patent number: 8076912
    Abstract: A first pump circuit generates a first voltage for decreasing the distance between primary electrodes. The first voltage is limited to a predetermined limit by a first limiter circuit. A second pump circuit generates a second voltage for keeping the distance between the primary electrodes constant. A third pump circuit generates the second voltage and has a supplying capacity smaller than the first one. The second voltage is limited by second and third limiter circuits. A ripple capacitor is charged up to the second voltage by the second pump circuit and the second limiter circuit within a period of time the first voltage is being generated. When a supplying voltage of the first pump circuit reaches to the first voltage, and a deformation stops, the second voltage is supplied by the third pump circuit and the third limiter circuit instead of the second pump circuit and the second limiter circuit.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: December 13, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Atsushi Suzuki
  • Patent number: 8008889
    Abstract: A charging circuit charges a secondary battery by using a first direct current power supply that generates and outputs a first voltage. A highest voltage among the first voltage of the first direct current power supply, a second voltage generated from power supplied from outside, and a secondary battery voltage of the secondary battery is supplied as a power supply to the charging circuit.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Ippei Noda
  • Patent number: 7962248
    Abstract: Methods of reducing peak electrical demand at a single customer location of an electrical service provider during at least one time interval during a day can include shifting the activation of a first electrical appliance located at the single customer location from the at least one time interval during a day to a second time interval during which a second electrical appliance is not activated for at least part of the second time interval. Related systems, circuits, and computer program products are disclosed.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: June 14, 2011
    Inventor: Daniel Flohr
  • Patent number: 7932704
    Abstract: A modulator for providing control pulses on a pulse control signal for controlling operation of a DC-DC converter is disclosed which includes a comparator, pulse control logic, a memory circuit and a switch circuit. The comparator compares a timing waveform with a compensation signal and provides a comparison signal with preliminary pulses. The pulse logic circuit receives the comparison signal and provides normal pulses on a normal pulse signal. The pulse logic circuit selects only those preliminary pulses which are provided during a permissible time window of each period of the periodic timing waveform. The memory circuit provides a pulse indication whenever a normal pulse does not occur on the pulse signal during any switching period. The switch circuit selects between the normal pulse signal and the comparison signal based on the pulse indication for providing the control pulses.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: April 26, 2011
    Assignee: Intersil Americas Inc.
    Inventors: Robert H. Isham, Weihong Qiu
  • Patent number: 7893664
    Abstract: A power supply includes a first switch to establish a first path to charge an output of the power supply by a voltage source, a second switch to establish a second path to discharge the output, and a third switch connected between the output and a capacitor. When to discharge the output, the third switch is turned on before the second switch turns on, to transfer a portion of energy on the output to the capacitor. When to charge the output, the third switch is turned on before the first switch turns on, to transfer a portion of the energy on the capacitor to the output.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: February 22, 2011
    Assignee: Richtek Technology Corp.
    Inventor: Yun-Chi Chiang
  • Patent number: 7893662
    Abstract: A device, such as a pump capacitor or an energy storing inductor, is charged by coupling it to a voltage source. Thereafter, the device is connected in parallel to one of the capacitors or capacitance cells to be charged, and the charging of the device and successive connections of it in parallel to a selected capacitor of the series of capacitors for charging it are replicated for all the capacitors of the series. The sequence of different connections of the device to the charge voltage source and to the selected one of the capacitors of the series is actuated through a plurality of coordinately controlled switches that establish distinct current circulation paths, according to a switched-capacitor or switched inductor techniques driven by respective periodic control signals that may be generated from a master clock signal.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: February 22, 2011
    Assignee: STMicroelectronics S.R.L.
    Inventors: Calogero Ribellino, Giovanni Benenati
  • Patent number: 7834599
    Abstract: In one embodiment, an apparatus is provided for a system including an integrated circuit coupled to a node to receive a supply voltage and having bypass capacitors coupled in parallel with the integrated circuit to the node. The apparatus comprises a first capacitor, a switch coupled to the first capacitor, and a voltage source configured to charge the first capacitor. The switch is coupled to receive a control signal that is asserted, during use, if the supply voltage to an integrated circuit is to be increased. The switch is configured to electrically couple the first capacitor to the node in response to an assertion of the control signal. When electrically coupled to the node, the first capacitor supplies charge to the bypass capacitors. A system comprising the apparatus, the node, the integrated circuit, and the bypass capacitors is also contemplated in some embodiments.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: November 16, 2010
    Assignee: Apple Inc.
    Inventor: Vincent R. von Kaenel
  • Patent number: 7808224
    Abstract: To accurately regulate output of a high-frequency power with a simple configuration. A high-frequency power supply circuit includes: a basic drive square wave generation circuit unit (5) for generating a basic drive square wave having an output frequency; a differential signal generation circuit unit (9) for generating a front edge differential signal of the basic drive square wave; a vibrator circuit unit (15) having a square wave signal generator (10) for outputting a square wave signal having a signal width within a period corresponding to a half cycle of the output frequency upon input of a trigger signal from outside and signal width control circuits (11, 12) varying/controlling the signal width of the square wave signal according to the control signal; and a switching amplification circuit unit (6) for amplifying the amplification source signal based on the output signal from the vibrator circuit unit (15).
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: October 5, 2010
    Assignee: Advanced Design Corp.
    Inventor: Tadashi Honda
  • Patent number: 7760522
    Abstract: The present invention is intended to prevent the flow of a large input current into a DC/DC converter, to which power is fed from a power supply, before a supply voltage delivered from the power supply reaches a rated output voltage. A control unit included in the DC/DC converter includes a steady state detection block that detects a condition in which an input voltage to be applied to the DC/DC converter has been stabilized, and inhibits the power feed from the DC/DC converter until the input voltage delivered from a power supply in a preceding stage is stabilized.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: July 20, 2010
    Assignee: Fujitsu Limited
    Inventors: Taku Nobiki, Takahiro Miyazaki
  • Patent number: 7728564
    Abstract: A load control device is adapted to be disposed in series with an AC voltage source and an electrical load and is operable to provide substantially all voltage provided by the AC voltage source to the load. The load control device comprises a controllably conductive device, a controller, a zero-crossing detector, and a power supply for generating a substantially DC voltage for powering the controller. The power supply is operable to charge an energy storage device to a predetermined amount of energy each half-cycle. The controller is operable to determine when the power supply has stopped charging from the zero-crossing detector each half-cycle, and to immediately render the controllably conductive device conductive to conduct the full load current. Before the controllably conductive device begins to conduct each half-cycle, only a minimal voltage develops across the power supply to allow the energy storage device to charge.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: June 1, 2010
    Assignee: Lutron Electronics Co., Inc.
    Inventors: William Bryce Fricke, Aaron Dobbins, James P. Steiner, Chen Ming Wu, Russell Weightman, David J. Perreault, Ryan Lane, Joseph William Sapp, Kyle A. McCarter
  • Patent number: 7723970
    Abstract: Rather than operating in asynchronous mode during turn-on ramps, a switching power regulator system may be configured to synthesize a digital waveform, which may protect against a pre-bias condition and maintain the desired ramp-up time and rate. The desired turn-on ramp may be generated digitally by counter logic, beginning with an initial value and incrementing at a programmed rate until a digital value equivalent to the desired output voltage is reached. When a pre-bias condition is not present, the output of the digital ramp generator may control a digital-to-analog converter (DAC), which may be configured to generate the reference voltage for the power regulator. To correct for a pre-bias condition, the pre-bias output of the power regulator may be measured prior to turn-on, using an analog-to-digital converter. The digital pre-bias value may be used to control the DAC until the value of the digital waveform generated by the ramp generator reaches the pre-bias value.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: May 25, 2010
    Assignee: Zilker Labs, Inc.
    Inventor: Kenneth W. Fernald
  • Patent number: 7683596
    Abstract: A control loop system is provided that employs an active DC output control circuit that more accurately calibrates the desired voltage at a load, e.g. 3.3 volts, by adjusting a trim pin on a DC/DC converter.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: March 23, 2010
    Assignee: Summit Microelectronics, Inc.
    Inventor: Anurag Kaplish
  • Patent number: 7616454
    Abstract: A control circuit having a programmable waveform for the output power limit comprises an oscillation circuit to generate an oscillation signal. The oscillation signal is used for producing a switching signal to control a switching device in response to a feedback signal of the power converter. A waveform generator generates a waveform signal in accordance with the oscillation signal. The waveform signal controls the control signal and limits the output power of the power converter. A resistor is coupled to the waveform generator to program the waveform of the waveform signal. By properly selecting the resistance of the resistor, which can be used to achieve an identical output power limit of the power converter for the low line and high line voltage input.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: November 10, 2009
    Assignee: System General Corporation
    Inventor: Ta-Yung Yang
  • Publication number: 20090251115
    Abstract: In one embodiment, an apparatus is provided for a system including an integrated circuit coupled to a node to receive a supply voltage and having bypass capacitors coupled in parallel with the integrated circuit to the node. The apparatus comprises a first capacitor, a switch coupled to the first capacitor, and a voltage source configured to charge the first capacitor. The switch is coupled to receive a control signal that is asserted, during use, if the supply voltage to an integrated circuit is to be increased. The switch is configured to electrically couple the first capacitor to the node in response to an assertion of the control signal. When electrically coupled to the node, the first capacitor supplies charge to the bypass capacitors. A system comprising the apparatus, the node, the integrated circuit, and the bypass capacitors is also contemplated in some embodiments.
    Type: Application
    Filed: June 18, 2009
    Publication date: October 8, 2009
    Inventor: Vincent R. von Kaenel
  • Patent number: 7564227
    Abstract: A power supply adapted to be coupled in series electrical connection between an AC voltage source and an electrical load for generating a DC voltage, the power supply comprising an energy storage capacitor, the DC voltage produced across the capacitor; a charging circuit adapted to be coupled in series electrical connection between the source and the load and to conduct a load current from the source to the load, the charging circuit coupled to the energy storage capacitor for charging the energy storage capacitor; a controllably conductive device coupled in parallel electrical connection with the charging circuit and having a control input for rendering the controllably conductive device conductive, the controllably conductive device adapted to carry the load current from the source to the load when the controllably conductive device is conductive; and a triggering circuit coupled to the control input of the controllably conductive device for causing the controllably conductive device to become conductive wh
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: July 21, 2009
    Assignee: Lutron Electronics, Co., Ltd.
    Inventors: Aaron Dobbins, Russell Weightman, David Perreault, James P. Steiner, Chen Ming Wu
  • Patent number: 7564226
    Abstract: In one embodiment, an apparatus is provided for a system including an integrated circuit coupled to a node to receive a supply voltage and having bypass capacitors coupled in parallel with the integrated circuit to the node. The apparatus comprises a first capacitor, a switch coupled to the first capacitor, and a voltage source configured to charge the first capacitor. The switch is coupled to receive a control signal that is asserted, during use, if the supply voltage to an integrated circuit is to be increased. The switch is configured to electrically couple the first capacitor to the node in response to an assertion of the control signal. When electrically coupled to the node, the first capacitor supplies charge to the bypass capacitors. A system comprising the apparatus, the node, the integrated circuit, and the bypass capacitors is also contemplated in some embodiments.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: July 21, 2009
    Assignee: Apple Inc.
    Inventor: Vincent R. von Kaenel
  • Patent number: 7541792
    Abstract: In one embodiment, a multi-channel power supply controller adjusts the value of an error signal to minimize overshoot and undershoot during load transients.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: June 2, 2009
    Assignee: Semiconductor Components Industries, L.L.C.
    Inventor: Paul J. Harriman
  • Publication number: 20090091304
    Abstract: A switching control circuit for multi-phases PFC converters is provided. It includes a PFC-control circuit coupled to receive a first-inductor signal and a feedback signal for generating a first-switching signal. The first-switching signal is utilized to switch the first inductor for power factor correction. A phase-detection circuit detects the first-switching signal and a second-inductor signal for generating a start signal and a phase-lock signal. The start signal is developed to enable a second-switching signal. The second-switching signal is coupled to switch a second inductor. An on-time-adjust circuit is coupled to adjust the on time of the second-switching signal in accordance with the phase-lock signal. The phase-lock signal is correlated to the period between the end of the second-inductor signal and the start of the second-switching signal.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 9, 2009
    Applicant: SYSTEM GENERAL CORPORATION
    Inventor: Ta-Yung Yang
  • Patent number: 7486040
    Abstract: A motor control circuit for supplying power to a DC motor which drives a mechanism having a driven shaft, the control circuit having a parallel combination of a capacitor and switch in series with the DC motor. When the movement of the driven shaft is obstructed, the motor driver and the switch are synchronized in a manner to first charge the capacitor and then to reverse the voltage generated by the motor driver to momentarily double the voltage applied to the DC motor so that the increased torque of the DC motor is able to overcome the obstruction. The mechanism having a shaft driven by the DC motor may be, for example, an ETC valve or a window regulator.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: February 3, 2009
    Assignee: Delphi Technologies, Inc.
    Inventor: Charles R. DeJohn