Constant Magnitude Control Patents (Class 307/33)
  • Patent number: 10199923
    Abstract: The present disclosure provides a discharging circuit, a power supply, and a display device for a rapid discharging, without causing any inconveniences to a user. The discharging circuit comprises a controlling section and a discharging section, wherein a controlling section is connected to a control voltage inputting terminal and a control node, and configured to adjust a voltage at the control node, under the control of a control voltage inputted from the control voltage inputting terminal; and a discharging section is connected to the control node, a first level terminal and a discharge voltage inputting terminal, and configured to conduct a connection between the discharge voltage inputting terminal and the first level terminal, under the control of the voltage at the control node, so as to discharge the discharge voltage inputting terminal through the first level terminal. Embodiments of the present disclosure may be used in the manufacture of display devices.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: February 5, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yanfu Li, Masakazu Okamura, Zhigang Zhou, Jifeng Tan
  • Patent number: 9847708
    Abstract: In one embodiment, a power factor correction (PFC) circuit can include: (i) a rectifier bridge and a PFC converter coupled to an input capacitor; (ii) a harmonic wave compensation circuit configured to shift a phase of a DC input voltage provided from the rectifier bridge, where the harmonic wave compensation circuit comprises a phase of about ?45° when a corner frequency is about 50 Hz; and (iii) a PFC control circuit configured to control the PFC converter, where the PFC control circuit comprises a first sampling voltage, and the harmonic wave compensation circuit is configured to control a phase of the first sampling voltage to lag a phase of the DC input voltage by about 45°.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: December 19, 2017
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yunlong Han, Huiqiang Chen
  • Patent number: 9778717
    Abstract: A busway system enables multiple interchangeable power support redundancies to be provided to electrical loads. The busway system includes multiple busways extending through an aisle space, where some busways carry power from separate primary power sources, and one or more busways carry power from a secondary power source. Busways are coupled to loads to provide power support directly to the loads, indirectly via devices that distribute power to the loads via branch circuits, etc. The power support redundancy provided to a load is established based at least in part upon which busways are coupled to the load, and power support redundancies can be changed by changing the couplings of particular busways with the loads. The busways can extend through the aisle space in a staggered configuration to enable load balancing between busways by restricting loads in certain regions of the aisle space to coupling with certain busways and not others.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: October 3, 2017
    Assignee: Amazon Technologies, Inc.
    Inventor: Faran Harold Kaplan
  • Patent number: 8724282
    Abstract: A method according to one embodiment may include discovering, by software, at least one variable from at least one component populated on a shelf system. The method may also include performing, by the software, at least one shelf management function based on at least one variable. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: May 13, 2014
    Assignee: Intel Corporation
    Inventors: Chetan Hiremath, Udayan Mukherjee
  • Publication number: 20140033409
    Abstract: Compensation system adapted for use with a battery-powered, PWM-driven portable electronic device to enable consistent power to the device load despite battery voltage drop resulting from battery depletion, comprising: a voltage divider circuit for proportionally adjusting the voltage to a measurable range; an analog-to-digital converter for receiving the output from the voltage divider and converting it into a digital voltage value; and a microprocessing unit for running software code steps for receiving digital voltage input and user-determined power setting input for determining a compensating duty cycle for application by the software to the PWM to drive the load consistently at the user-determined power setting despite decrease in battery voltage resulting from battery depletion.
    Type: Application
    Filed: October 6, 2013
    Publication date: February 6, 2014
    Inventors: Vincent O'Malley, Jack Cornelius
  • Publication number: 20130278062
    Abstract: A light adjusting circuit, it provide power required for an overall operation of light adjusting circuit, and it utilizes a light adjusting controller to perform light adjusting of load. During light adjusting, in case operating voltage of a driving controller is equal to or greater than a threshold value, then a rectifier or a power controller provides a first power supply to driving controller through an AC voltage adjusted by light adjusting controller, so that it can regulate a driving voltage through power controller based on DC voltage variation, to drive a load. Otherwise, in case operating voltage of driving controller is less than threshold value, it is switched to a battery to provide a second power supply to driving controller, to make it have stable operating voltage, control power controller to output driving voltage to load, to eliminate blinking of load when conduction angle is small.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 24, 2013
    Applicants: CHAMPION ELITE COMPANY LIMITED, MIDAS WEI TRADING CO., LTD.
    Inventors: Tao-Chin WEI, Kuo-Yi YU
  • Publication number: 20130181522
    Abstract: A power management control circuit controls a first power transistor to convert a input voltage to an output voltage and controls a second power transistor to charge a battery from the output voltage. The first power transistor is coupled between the input voltage and the output voltage, and the second power transistor is coupled between the output voltage and the battery. The power management control circuit includes: a detection transistor detecting a current through the second power transistor and generating a charging reference voltage; an amplifier comparing the output voltage with the voltage of the battery to generate an amplified signal for controlling the charging reference voltage; a comparator comparing a reference voltage with the charging reference voltage to generate an EOC (End of Charge) signal for determining whether to stop charging the battery; and an offset voltage compensation device compensating an input offset voltage of the amplifier.
    Type: Application
    Filed: January 17, 2012
    Publication date: July 18, 2013
    Inventors: Hsuan-Kai Wang, Nien-Hui Kung
  • Publication number: 20120086271
    Abstract: A method of controlling a plurality of output voltages in a multi-output power supply device for generating a plurality of output powers by using a transformer. The method includes, if a system to which power is supplied from the multi-output power supply device is in a standby mode, blocking any one of at least two output powers of a secondary side of the transformer, wherein the blocked power is supplied to the system; and compensating for a resistance of a feedback circuit connected to a switching controller of a power switch of a primary side of the transformer in relation to one or more unblocked output powers of the transformer and maintaining the output of the unblocked output power to be constant.
    Type: Application
    Filed: December 15, 2011
    Publication date: April 12, 2012
    Inventor: Jee-hoon JUNG
  • Publication number: 20110309679
    Abstract: Embodiments for at least one method and apparatus of a multi-use voltage regulator providing a supply voltage to a power amplifier and at least one other device are disclosed. One method includes generating a plurality of regulated voltage supplies from an unregulated voltage. An output signal power level of the power amplifier is determined. A one of the regulated plurality of voltage supplies and the unregulated voltage supply is selected as a power amplifier voltage supply for the power amplifier based at least in part on the output signal power level of the power amplifier. If the selected power amplifier voltage supply is one of the plurality of regulated voltage supplies, then the selected one of the plurality of regulated voltage supplies is simultaneously provided to the power amplifier and the at least one other device.
    Type: Application
    Filed: June 18, 2010
    Publication date: December 22, 2011
    Applicant: R2 SEMICONDUCTOR, INC.
    Inventors: David Fisher, Ravi Ramachandran
  • Patent number: 8067854
    Abstract: A buffer driving capability control device is provided which can suppress occurrence of radiated noise due to a load driven by large driving power in the case where loads differing in driving power are connected to one terminal. The device includes an output buffer which can switch between the driving capability for driving a load requiring large driving power and the driving capability for driving a load requiring small driving power, and also includes a control period for driving the load requiring the large driving power and a control period for driving the load requiring the small driving power, and during the respective control periods, switches the driving capability of the output buffer to the ones suitable for the corresponding loads.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 29, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoki Kobayashi
  • Patent number: 7944087
    Abstract: A method and an apparatus for damping voltage oscillation of a voltage intermediate circuit of a frequency converter, the frequency converter comprising a half controlled rectifier bridge coupled to a supply network. The method comprises determining magnitude (Uc) of voltage of the voltage intermediate circuit, determining magnitude (Uin) of rectified voltage of the supply network, forming a derivative of a difference (Uin?Uc) between the rectified voltage of the supply network and the voltage of the voltage intermediate circuit, delaying firing of controllable components of the rectifier bridge on the basis of the formed derivative.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: May 17, 2011
    Assignee: ABB OY
    Inventor: Markku Talja
  • Patent number: 7781908
    Abstract: A power converter that gives priority to the high power output and only provides power to the low power output when the total potential output power is equal to or less than the rated power of the power converter. A specific power threshold is established, and when the high power output remains below this threshold for a period of time the low power output is allowed to turn on. If the high power output subsequently exceeds this threshold for a period of time, then an electronic circuit powers down the low power output in order to keep the total output power below the rated power of the power converter. Subsequently, the high power output is checked against the threshold to determine if the low power output can be turned on again. If the high power output is below the threshold, then the low power output is turned on.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: August 24, 2010
    Assignee: iGo, Inc.
    Inventors: Garry DuBose, Ann Briggs
  • Publication number: 20100149458
    Abstract: A switching circuit includes multiple transistors connected to the primary winding of a transformer, and alternately applies an input voltage and a ground voltage to the primary winding according to the ON/OFF operations of the transistors. Multiple ballast capacitors are respectively provided to multiple fluorescent lamps. One terminal of each ballast capacitor is connected to the secondary winding so as to form a common terminal. The other terminal thereof is connected to the fluorescent lamp. A first capacitor and a second capacitor are arranged in this order in series between an connection node that connects the fluorescent lamp to be monitored and the corresponding ballast capacitor and the ground terminal. An abnormal state judging unit compares the voltage at the connection node that connects the first capacitor and the second capacitor with a predetermined threshold voltage.
    Type: Application
    Filed: June 5, 2009
    Publication date: June 17, 2010
    Applicant: ROHM CO., LTD.
    Inventors: Goang-Woo NAM, Junichi HAGINO, Kenichi FUKUMOTO
  • Publication number: 20100013307
    Abstract: Point-of-load (POL) regulators may be configured as multiphase POL DC-to-DC (direct current to direct current) converters, operating in a multiphase configuration in order to boost the total current available to a system. Current balancing may be performed by utilizing an active low bandwidth current sharing algorithm that uses matched artificial line resistance (droop resistance) while maintaining multi-loop stability during both steady-state and dynamic transient states. The current sharing algorithm may be facilitated through digital communication between the devices, where the digital bus may be a single wire bus, a parallel bus or a clock-and-data bus.
    Type: Application
    Filed: July 19, 2009
    Publication date: January 21, 2010
    Inventors: Douglas E. Heineman, Kenneth W. Fernald
  • Publication number: 20090309417
    Abstract: Methods and systems for a multiple output capacitive buck/boost converter are disclosed and may include charging one or more input capacitors via an input voltage. One or more output voltages may be generated on a chip by switching the charged input capacitors to output capacitors via a switch array on the chip. The switch array may be controlled via a state machine. A constant current and/or voltage may be generated for the one or more output voltages via one or more current and/or voltage comparators. A variable resistance may be coupled in series with one or more switches in the switch array. The one or more input capacitors may be discrete capacitors external to the chip and/or integrated within the chip. One or more of the output voltages may be greater than the input voltage, or may be less than the input voltage.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 17, 2009
    Inventor: John Walley
  • Publication number: 20090309598
    Abstract: A power supply having an input, wherein the power supply includes a multi-winding transformer having an input and a plurality of outputs, and a plurality of rectifiers to provide a plurality of DC output voltages, wherein each rectifier is coupled to an output of the multi-winding transformer. The power supply further includes a regulator circuit coupled between the transformer input and one of the transformer outputs, and configured to regulate an input voltage to the multi-winding transformer to minimize a variance of each rectifier DC output voltage.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 17, 2009
    Inventors: Pengcheng Zhu, Juan Antonio Sabate, Yunfeng Liu
  • Publication number: 20090251072
    Abstract: A direct current power system according to one non-limiting embodiment includes a direct current power source operable to distribute a direct current voltage throughout at least one structure, and at least one controller operable to selectively couple a direct current load to the direct current voltage in response to a wireless signal from an energy-harvesting switch.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 8, 2009
    Inventors: Thomas Alan Barnett, Jeffrey Lott, Jian Xu
  • Publication number: 20090206664
    Abstract: Provided is a power supply circuit generating a desired voltage by voltage multiplication, and satisfying both a demand to reduce current consumption and a demand to enable operation with a low power voltage at the same time. A power supply circuit of the present invention includes: a voltage generating circuit for generating internal voltages VI1 and VI2 from a power supply voltage VDD; a voltage step-up/down circuit for generating voltages VO1 to VO3 each having a different level by multiplying the internal voltages VI1 and VI12; and a voltage comparison circuit for comparing the voltage VO2 with the power supply voltage VDD. The voltage generating circuit is configured to select one of the internal voltages VI1 and VI2 according to an output of the voltage comparison circuit. Additionally, a voltage multiplication rate of the voltage multiplication circuit is switched according to the output of the voltage comparison circuit.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 20, 2009
    Applicant: NEC Electronics Corporation
    Inventors: Makoto Sasaki, Kentaro Tanaka, Takafumi Natsume
  • Publication number: 20090167086
    Abstract: A system and method for providing direct-current power is described. In one embodiment a direct current voltage is converted into at least two regulated DC voltages, and a first of the at least two regulated DC voltages is applied across a first and second outputs and a second of the at least two regulated DC voltages is applied across the second output and a third output. And when a first impedance across the first and second outputs is less than a second impedance across the second and third outputs, current is received via the second output while delivering power to the first and second impedances.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 2, 2009
    Inventor: Eric Seymour
  • Publication number: 20090021076
    Abstract: A DC converter is connected to a DC source on its input side. On the output side, the DC delivers a converted DC voltage to at least one electric consumer via a cable connection. To improve such a DC converter in that it has a comparatively simple structural design and is able to reliably convert high DC voltages even in the case of high power, and in such a way that the reliability of the converter is increased and cooling systems entailing high costs can be dispensed with, the DC converter comprises a plurality of DC converter components, each of said DC components being, on the input side, serially connected to the DC source and, on the output side connected in parallel to the cable connection so as to provide the converted DC voltage for the electric consumer.
    Type: Application
    Filed: October 2, 2008
    Publication date: January 22, 2009
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: Peter Kunow, Klaus Biester
  • Publication number: 20080084113
    Abstract: A signal transmission circuit having four lanes includes a constant voltage circuit to generate a constant voltage, a current supply circuit, and differential driver circuits respectively placed for the lanes. The current supply circuit receives a constant voltage from the constant voltage circuit and generates four currents having a value corresponding to a prescribed voltage-current conversion ratio and outputs them in parallel. The differential driver circuits respectively receive the currents output from the current supply circuit and output a voltage having an amplitude corresponding to the prescribed voltage-current conversion ratio. The current supply circuit includes a voltage divider circuit and an analog selector, which form a current supply control circuit capable of changing the voltage-current conversion ratio.
    Type: Application
    Filed: October 3, 2007
    Publication date: April 10, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Tadashi IWASAKI
  • Patent number: 7323793
    Abstract: A system and method for driving a load at a desired operating level. A driver is connected to a load. The load can be selected from a plurality of loads by a selection system, such as a multiplexer, or a single load can be utilized. Feedback from the load is provided to the driver for achieving the desired operating level. A zero temperature coefficient resistance formed by two resistors having different resistances can be used so that the driver emulates an ideal resistor having a substantially zero temperature coefficient, providing a temperature independent current to the load.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: January 29, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Eric C. Blackall, David J. Baldwin, Patrick P. Siniscalchi
  • Patent number: 7154754
    Abstract: An assembly comprises a voltage regulator module and a field-pluggable voltage converter module configured in an arrangement that interlocks with and optionally attaches to the voltage regulator module.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: December 26, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Stephan Karl Barsun, Gary W. Williams
  • Patent number: 7091630
    Abstract: A device for inhibiting power supply voltage fluctuation that is caused by fluctuation of a load current generated by a load circuit. The device includes a current consumption circuit, a data generation circuit, and a D/A converter. The current consumption circuit is connected to a power supply and the load circuit to generate a consumption current that flows parallel to the load current of the load circuit. The data generation circuit controls the consumption current of the current consumption circuit in order to inhibit fluctuation of an output current of the power supply, which is the sum of the load current and the consumption current, when the load current rises and when the consumption current falls. The D/A converter converts the digital signal to an analog signal and provides the analog signal to the current consumption circuit.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: August 15, 2006
    Assignee: Fujitsu Limited
    Inventor: Shigetaka Asano
  • Patent number: 6828696
    Abstract: A system and method are provided to power a plurality of magnetrons devices. The system may include a power supply device to power a first magnetron device, a second magnetron device and a third magnetron device. A control device may control (or apportion) an amount of current to each of the second and third magnetron devices.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: December 7, 2004
    Assignee: Fusion UV Systems, Inc.
    Inventors: Jonathan D. Barry, Ta Hai Yoh, Moossa Joseph Arman
  • Patent number: 6812590
    Abstract: External output terminal 28 is clamped by clamping circuit 20, and a current mirror is configured using diode circuit 23 within clamping circuit 20 and detector transistor 34. When the voltage of external output terminal 28 can no longer be maintained by the first current supply circuit 11 alone as load 27 increases, clamping circuit 20 shuts off, and detector transistor 34 shuts off. As detector transistor 34 shuts off, the second current supplying element 12 becomes conductive and supplies a current to load 27. Because the second current supplying element 12 is not operating during normal operation during which the current consumption by load 27 is low, the current consumption is low. In addition, because no amplifier is required, only a small number of elements are required.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: November 2, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Yonghwan Lee, Manabu Nishimizu, Yoshinori Okada
  • Patent number: 6650095
    Abstract: The converter uses the energy stored in the output filter of a step-down (or buck) converter and in the inductor of a step up/down (or buck-boost) converter to supply a second output of opposite sign. In particular, the converter has a first input receiving an input voltage; a first output supplying a first output voltage of a first sign; a second output supplying a second output voltage of opposite sign; a controlled switch connected between the first input and a first intermediate node; an inductor connected between the first intermediate node and the first output; a diode connected between the first intermediate node and a second intermediate node; and a dual voltage generating circuit connected between the second intermediate node and the second output.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: November 18, 2003
    Assignee: STMicroelectronics S.r.l.
    Inventors: Natale Aiello, Francesco Giovanni Gennaro
  • Patent number: 6603218
    Abstract: A method is described, for managing the energy consumption of electric users (LB, LS, FO, PG, CO), including household appliances, in a domestic environment (A), said users being operatively connected in a network (RE), each one of said users (LB, LS, FO, FG, CO) presenting an electric load to a source of electric energy, comprising the steps of: presetting an appropriate maximum limit of power (Pmax) which can be supplied by said source of electric energy, providing each user (LB, LS, FO, FG, CO) with control means for managing its own consumption of electric energy, measuring the instantaneous total consumption of the electric energy (Ply) supplied by said source to said domestic environment (A), transmitting to the control means of each one of said users (LB, LS, FO, FG, CO), by means of said network (RE), information relating to the instantaneous total consumption of the supplied electric energy (PIT), making the control means of each one of said users (LB, LS, FO, FG, CO) capable of adjusting the electri
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: August 5, 2003
    Assignee: Wrap S.p.A.
    Inventor: Valerio Aisa
  • Patent number: 6586915
    Abstract: A power control system and method of power control, the system consists of a power transformer having a primary portion and a secondary portion and a wiring run having a length and coupled at one end to the secondary portion. Also included is a constant voltage controller coupled to another end of the wiring run. The constant voltage controller receives an input power signal from the power transformer and outputs an output power signal at a specified voltage level to a plurality of low voltage electrical loads. The input power signal is at a higher voltage level than the specified voltage level and the output power signal is maintained at the specified voltage level regardless of a change in a voltage drop of the power control system. In preferred embodiments, the system uses low power logic rectifiers to rectify AC power signals to provide reset, current feedback and voltage feedback signals.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: July 1, 2003
    Inventors: John R. Reeves, Randy Weisser
  • Patent number: 6583520
    Abstract: The invention provides a new hybrid 4-in-1 power controller chip for a PC mainboard which integrates a synchronous buck switching regulator to supply the CPU core voltage, a standard buck switching regulator for I/O circuits, a linear controller for the GTL bus, and a linear regulator with built-in pass transistor for a clock generator. On this basis, a hybrid power system for a PC mainboard is constructed. As compared with the conventional separate power systems on a PC mainboard, the hybrid power system of the present invention can save board area and reduce cost. Test results show this system has high precision and its synchronous switching regulator meets the specifications of Intel's VRM8.4 design guidelines for Pentium III CPUs.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: June 24, 2003
    Assignee: Winbond Electronics Corp.
    Inventors: Bingxue Shi, Lu Chen, Chun Lu
  • Patent number: 6538342
    Abstract: A multiple output power supply with a constant volt-second clamp circuit is provided. The multiple output power supply includes a transformer having a primary winding electrically connected to a supply voltage and at least two secondary windings for providing multiple output voltages, and a constant volt-second clamp circuit electrically connected to the primary winding for achieving a constant volt-second product clamp over a varying input voltage at the primary winding where the constant volt-second product clamp over the varying input voltage at the primary winding is independent of a load effect of the secondary windings.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: March 25, 2003
    Assignee: Deep & Far
    Inventor: Kuei-Hsiang Tsai
  • Patent number: 6509656
    Abstract: A system and method are provided to power two magnetrons devices. The system may include a power supply device to power a first magnetron device and a second magnetron device. A control device may control an amount of current reaching at least the first magnetron device.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: January 21, 2003
    Assignee: Fusion UV Systems
    Inventors: Ernest G. Penzenstadler, Jonathan D. Barry, Gregory H. Owen
  • Patent number: 6462432
    Abstract: What follows is a description of a method and device for the inductive transmission of electric power from a medium-frequency source with a frequency of (fM) to one or more mobile consumers which are inductively coupled to the transmission line via an extended transmission line.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: October 8, 2002
    Assignee: ALSTOM Anlagen- und Automatisierungstechnik GmbH
    Inventors: Anton Seelig, Samir Salama, Erik Lindig, Eberhard Kaus
  • Patent number: 6426611
    Abstract: A power control system and method of power control, the system consists of a power transformer having a primary portion and a secondary portion and a wiring run having a length and coupled at one end to the secondary portion. Also included is a constant voltage controller coupled to another end of the wiring run. The constant voltage controller receives an input power signal from the power transformer and outputs an output power signal at a specified voltage level to a plurality of low voltage electrical loads. The input power signal is at a higher voltage level than the specified voltage level and the output power signal is maintained at the specified voltage level regardless of a change in a voltage drop of the power control system. In preferred embodiments, the system uses low power logic rectifiers to rectify AC power signals to provide reset, current feedback and voltage feedback signals.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: July 30, 2002
    Inventors: John R. Reeves, Randy Weisser
  • Patent number: 6396169
    Abstract: A system and method for developing a cost efficient electronic power supply system that handles a range of supported electronic circuits is provided. The electronic power supply system adaptively configures the power applied to electronic circuits. Thereby, eliminating redesign of a power supply system when a newly developed or different electronic circuit is implemented. When an electronic circuit is attached to the electronic power supply, a controller confirms electronic circuit presence and queries for electronic circuit power on requirements. As more electronic circuits are added, the controller examines each electronic circuit power on requirements and determines if a power conflict is present. If a conflict exists, the controller will not supply power to the electronic circuits until the conflict is resolved.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: May 28, 2002
    Assignee: 3Com Corporation
    Inventors: Derick Voegeli, Michael Cranston, Gregory Glasshof, Scot Salzman, Roger Shuma
  • Patent number: 6265789
    Abstract: In at least two separated devices, a data transmission or a power transmission is performed through the electromagnetic coupling of coils which are arranged in mutually facing positions in the respective devices. In order to reduce the effect of a displacement between two coils even if the two coils are displaced from each other, the inner diameter of a coil 110 on the side of a station, as a primary coil, for performing the data transmission or the power transmission, is set to be larger than the inner diameter of a coil 210 on a watch side, as a secondary coil, by at least 1 mm.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: July 24, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Katsuyuki Honda, Motomu Hayakawa, Ichiro Aoshima, Hidetoshi Matsuki
  • Patent number: 6239509
    Abstract: A step-down switched-mode power supply circuit includes a transformer having at least one primary winding and at least one secondary winding, a current sensing device for sensing a current through a primary winding of the transformer, a first switch and a second switch, a first comparator for determining if the current through the current sensing device exceeds a threshold, a voltage regulator coupled to the secondary winding to produce a regulated voltage, a second comparator for determining if the regulated voltage has drooped below an acceptable level, a counter coupled to the second comparator for generating a signal having a fixed number of switch cycles, and control circuitry for generating signals controlling the first switch and the second switch and responsive to the first comparator to enter a power saving mode disabling the signals, and to the second comparator to temporarily exit the power saving mode for a fixed number of cycles when the regulated voltage has drooped below an acceptable level.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: May 29, 2001
    Assignee: Semtech Corporation
    Inventors: William Edward Rader, III, John Fogg
  • Patent number: 6057607
    Abstract: A step-down switched-mode power supply circuit includes a transformer having at least one primary winding and at least one secondary winding, a current sensing device for sensing a current through a primary winding of the transformer, a first switch and a second switch, a first comparator for determining if the current through the current sensing device exceeds a threshold, a voltage regulator coupled to the secondary winding to produce a regulated voltage, a second comparator for determining if the regulated voltage has drooped below an acceptable level, a counter coupled to the second comparator for generating a signal having a fixed number of switch cycles, and control circuitry for generating signals controlling the first switch and the second switch and responsive to the first comparator to enter a power saving mode disabling the signals, and to the second comparator to temporarily exit the power saving mode for a fixed number of cycles when the regulated voltage has drooped below an acceptable level.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: May 2, 2000
    Assignee: Semtech Corporation
    Inventors: William Edward Rader, III, John Fogg
  • Patent number: 5684679
    Abstract: A novel switching mode power supply (SMPS), which is capable of substantially reducing the response time of the SMPS for generating a plurality of regulated DC output voltages from an AC input power, comprises a first rectifier for rectifying the AC input power to produce a rectified AC power signal within a predetermined range; a transforming device for generating a plurality of scaled-down AC power signals from the rectified AC power signal; a second rectifier for producing and providing a plurality of regulated DC output voltages from the plurality of scaled-down AC power signals to the plurality of loads through respective load lines connected thereto; and a unit for grounding the rectified AC power signal previously charged in the first rectifier if there occurs a disruption in the supply of the AC input power to the SMPS, to thereby promptly produce the plurality of regulated DC output voltages when the supply of the AC input power is resumed.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: November 4, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Jae-Gyoo Hong
  • Patent number: 5543666
    Abstract: A method of reducing the peak load of energy supply network systems to which a number of consumer units, each of which has several consumers, are connected. The power consumption of the consumer units can be limited to a predetermined limiting value. At least some of the consumers of a consumer unit are operated one by one in a sequence controlled by a preselectable coordination program if the power consumption of consumers that are switched on has reached the predetermined limiting value. An apparatus for limiting the power consumption of a consumer unit that includes several consumers and is fed from an energy supply connection, comprises a coordination means that is connected to separating switches which are linked to at least some of the consumers and controls the separating switches via a program in such a way that the power consumption of the energy supply connection does not surpass a predetermined limiting value.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: August 6, 1996
    Inventor: Wolfgang Priesemuth
  • Patent number: 5481140
    Abstract: The present invention relates to a power distribution control system for suppressing a total quantity of working current in a group of loads to a level equal to or lower than a set quantity of current by controlling the loads. The power distribution control system includes a central communication terminal and a plurality of customer communication terminals connected to the center communication terminal through communication lines. Each of the customer communication terminals is responsive to a presentation signal from the center communication terminal that requests time periods for, and quantities of power reduction. The central communication terminal also provides a response signal to selected customer communication terminals. The response signal indicates that a proposal for power reduction by the customer has been accepted.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: January 2, 1996
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuhiro Maruyama, Masahiro Inoue, Noriyuki Kushiro, Rieko Iwatsubo
  • Patent number: 5202618
    Abstract: An electric power supply system distributes power voltage levels to electric circuits different in operating voltage from one another, and comprises a plurality of step-down units each coupling two of the electric circuits, wherein each of the plurality of step-down units comprises a first step-down transistor having an emitter-and-collector current path coupled between the associated two electric circuits, and a second step-down transistor having an emitter-and-collector current path between one of the associated two electric circuit and another step-down unit so that part of current from one of the associated two electric circuits is reused in the other of the associated two electric circuits.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: April 13, 1993
    Assignee: NEC Corporation
    Inventor: Kouichi Nishimura
  • Patent number: 5128602
    Abstract: A single constant voltage power supply concurrently supplies a plurality of independent loads each with an independently selectable constant current load without interaction between the loads (currents) by employing a plurality of parallel connected circuits of electrical lengths equal to (2n-1)90.degree. each connected between the constant voltage source and a different one of said loads.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: July 7, 1992
    Assignee: Metcal, Inc.
    Inventor: Philip S. Carter, Jr.
  • Patent number: 4868410
    Abstract: In the load flow calculating method of the present invention, a Jacobian matrix for reactive power with respect to voltage is made to coincide with a part of a Jacobian matrix for effective power with respect to phase by introducing variables of the quotients of differences between effective power and reactive power flowing through each node and specified values divided by the square of voltage on each node, whereby the need for triangular factorization of the Jacobian matrix for reactive power with respect to voltage is eliminated, and, at the time of calculating a voltage correction amount, the voltage correction amount is compensated by the use of the product of a Jacobian matrix for reactive power with respect to phase and a vector of phase correction amount, and by virtue of the needlessness of triangular factorization of the Jacobian matrix for reactive power with respect to voltage and nonnecessity, at the time of calculating the voltage correction amount, for calculating discrepancy of reactive power
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: September 19, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shizuka Nakamura
  • Patent number: 4833338
    Abstract: A ferroresonant regulator for use in an inductively coupled high frequency power distribution system. A constant current resonant power source, comprising a sine wave oscillator (12), an amplitude controlled amplifier (16), a power amplifier (20), and an impedance matching transformer (24), provides current at a frequency of 38 kHz to a supply loop (68) that is installed in the floor of an aircraft passenger space. A current sensing transformer (32), and a voltage sensor (46) produce feedback signals that are used to control the amplitude of the current circulating in the supply loop, maintaining it substantially constant. A plurality of multiturn coils (70) are disposed proximate the supply loop. Connected to each of the multiturn coils is a saturable transformer (76), which includes a secondary winding attached to a load comprising an entertainment and passenger service system installed in each seat. A tertiary winding (106) on the saturable transformer is connected across a resonance capacitor (108).
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: May 23, 1989
    Assignee: The Boeing Company
    Inventors: Ted L. Bartlett, Mervin E. Eaton
  • Patent number: 4804916
    Abstract: A regulating A.C. power controller regulates the selected levels of power to be applied to a plurality of loads by producing a digital signal directly from the A.C. voltage with a pulse duration representative of load power which can be applied as an input to the microprocessor without the need for prior analogue to digital conversion. The load power level is displayed in terms of percentage of power source. Remote control units, such as a computer, can be connected with the power controller to program it for power level settings and warm up time.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: February 14, 1989
    Assignee: Timothy Yablonski
    Inventor: Richard W. Frank
  • Patent number: 4724363
    Abstract: A current control circuit for high voltage applications includes series-connected high and low voltage sources through which the current to be regulated flows. The low voltage source is a capacitor which is periodically recharged through a flyback transformer by a series of constant energy pulses having a very low duty cycle. The peak value of the flyback pulses are detected to provide a "condition signal" which is representative of the state-of-charge on the capacitor and can be used to protectively inhibit operation of the control circuit and can, in a variant of the circuit be used as an error control signal to maintain the current at a constant level. In the preferred embodiment a sensing capacitor is placed in parallel to the pulsed capacitor to detect the fluctuations in potential and form a sense current which is representative of the regulated current and which is used in a feedback loop to form a control signal for maintaining the regulated current constant.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: February 9, 1988
    Assignee: General Electric Company
    Inventor: Richard W. Buer
  • Patent number: 4611126
    Abstract: A power on-off reset generator for monitoring a power supply for a logic system powered from the monitored power supply. A precision-voltage sensor produces a control signal for a time delay circuit when the power supply rises above a preselected value. A delay signal is generated which maintains an active-LOW control signal to the logic system and causes a Schmitt trigger circuit to produce a HIGH control signal to the logic system at the end of the delay signal.
    Type: Grant
    Filed: October 4, 1984
    Date of Patent: September 9, 1986
    Assignee: Werkzeugmaschinenfabrik Oerlikon-Buehrle AG
    Inventor: Peter A. Miller
  • Patent number: 4538073
    Abstract: A power distribution system intended for use in a highly modular desk top computer system is disclosed. The invention provides a programmable modular DC power supply including a power module that produces a first fixed regulated DC voltage which is coupled from the power module to a power bus. Thereafter the first voltage is distributed to a plurality of DC-to-DC convertors, each of which is operable to change the first DC voltage to a second regulated DC voltage selected from a plurality of programmed voltage values.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: August 27, 1985
    Assignee: Convergent Technologies, Inc.
    Inventors: Diab E. Freige, John J. Lockwood, Michael Ramsay, Leroy B. Keely
  • Patent number: 4494010
    Abstract: An apparatus especially adapted for use in AC power systems of the type having a device for reducing power consumption by reducing load voltage, the apparatus having a sensor for detecting an increase in load current and for controlling a responsive increase in load voltage to compensate for the added load causing the increase in current. The apparatus can be used in three-phase AC systems for controlling each phase independently and can be made sufficiently sensitive to operate in a 28,000 Watt fluorescent light load while responding to as little as 400 Watt load additions to assure quick and efficient ignition of newly turned-on lights. A digital memory device, in the form of a state machine in the preferred embodiment, is used to control operation and timing for one to three phases while permitting low line voltage override and periodic timing override operation.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: January 15, 1985
    Assignee: Standum Controls, Inc.
    Inventor: Albert J. Donnelly