Temperature Compensation Of Semiconductor Patents (Class 323/907)
  • Patent number: 10578664
    Abstract: A drive circuit for an insulated-gate semiconductor element includes a current source which generates a current to be supplied to a gate of the insulated-gate semiconductor element, a current output circuit which controls supply of the current generated by the current source to the gate of the insulated-gate semiconductor element in accordance with a drive signal, an output current control circuit which controls a magnitude of the current generated by the current source in accordance with a control voltage according to an operating temperature of the insulated-gate semiconductor element, and a control voltage detection terminal which is provided in the output current control circuit and enables detection of the control voltage from outside.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: March 3, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Takahiro Mori
  • Patent number: 10530244
    Abstract: A switch circuit includes a first switch element defined by an FET, and an active snubber circuit connected between a drain and a source of the first switch element and including a second switch element defined by an FET, a capacitor connected in series to the second switch element, a third switch element connected to a gate of the second switch element and turned on to extract an electric charge of capacitance between the gate and a source of the second switch element, and a delay circuit that turns on the third switch element at a timing delayed from a timing at which the second switch element is turned on.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: January 7, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takami Muto, Takayoshi Nishiyama
  • Patent number: 10103622
    Abstract: A switching module comprising at least one power switching device arranged to output from an output node thereof a load current for the switching module, and at least one current sense component arranged to generate at least one sense current representative of the load current. The at least one current sense component comprises at least one temperature coefficient compensation resistance within the path of the at least one sense current and arranged to cause the at least one sense current to be at least partly compensated for a temperature coefficient caused by at least one parasitic routing resistance of a load current path for the at least one power switching device.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: October 16, 2018
    Assignee: NXP USA, Inc.
    Inventor: Vasily Alekseyevich Syngaevskiy
  • Patent number: 10037859
    Abstract: A method of over-temperature protection for a power switch, can include: (i) generating a sensing signal by sensing a temperature of the power switch; (ii) determining a temperature threshold signal based on a conduction voltage between first and second terminals of the power switch, where a value of the temperature threshold signal is reduced as the conduction voltage increases; and (iii) turning off the power switch when the sensing signal is greater than or equal to the temperature threshold signal.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: July 31, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Jin Jin
  • Patent number: 9787244
    Abstract: An air conditioner includes an inverter circuit, a control unit that controls the inverter circuit, a compressor having a protection device (a pressure switch), and a phase-voltage detection circuit (a U-phase voltage detection circuit) that detects a voltage at any of three-phase windings (compressor windings) of the compressor. The control unit includes a shutdown-cause specifying unit that determines presence or absence of an operation of the protection device based on a phase voltage value detected by the phase-voltage detection circuit, by turning on any of a plurality of switching elements constituting the inverter circuit, after the compressor has been shut down, and specifies a cause of the shutdown of the compressor.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: October 10, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Norihiko Sugisaki, Norikazu Ito
  • Patent number: 9762132
    Abstract: An electrical circuit for providing electrical power for use in powering electronic devices, such as monitors, televisions, white goods, data centers, and telecom circuit boards, is described herein. The electrical circuit includes an input terminal configured to receive an input power signal, an output terminal configured to provide an output power signal, and a forward converter coupled to the input and output terminals. The forward converter includes a transformer, and a primary side regulation circuit coupled to a primary side of the transformer. The primary side regulation circuit includes a switching device coupled to the primary side, a current sense circuit configured to sense a current level on the primary side, and a controller configured to generate a pulse-width modulated control signal delivered to the switching device as a function of the sensed current level to regulate the transformer to deliver the output power signal at a desired voltage level.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: September 12, 2017
    Assignee: Advanced Charging Technologies, LLC
    Inventors: Michael H. Freeman, W. J. “Jim” Weaver, Jr., Mitchael C. Freeman, Robert Dieter, Andrea Baschirotto, Piero Malcovati, Marco Grassi, Glenn Noufer, Randall L. Sandusky, Neaz Farooqi, Jim Devoy, Silvia Jaeckel, Madison Hayes Yarbro Freeman
  • Patent number: 9691443
    Abstract: Systems and methods are described for compensating for variations in process, voltage, temperature, or combinations thereof in an apparatus. An example apparatus may be a memory circuit. A pre-driver circuit and driver circuit may be associated with the memory circuit. A reference generator may provide the pre-driver circuit with reference signals that are insensitive to process, voltage, and temperature. The pre-driver circuit may receive the reference signals and the pre-driver circuit output ramping rate may then be made less sensitive to variations in process, voltage, and temperature. The pre-driver circuit output may then be supplied to a driver circuit that may then output a final driver data output with reduced noise.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: June 27, 2017
    Assignee: Micron Technology, Inc.
    Inventor: Jiawei Chen
  • Patent number: 9602016
    Abstract: An electrical circuit for providing electrical power for use in powering electronic devices, such as monitors, televisions, white goods, data centers, and telecom circuit boards, is described herein. The electrical circuit includes an input terminal configured to receive an input power signal, an output terminal configured to provide an output power signal, and a forward converter coupled to the input and output terminals. The forward converter includes a transformer, and a primary side regulation circuit coupled to a primary side of the transformer. The primary side regulation circuit includes a switching device coupled to the primary side, a current sense circuit configured to sense a current level on the primary side, and a controller configured to generate a pulse-width modulated control signal delivered to the switching device as a function of the sensed current level to regulate the transformer to deliver the output power signal at a desired voltage level.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: March 21, 2017
    Assignee: ADVANCED CHARGING TECHNOLOGIES, LLC
    Inventors: Michael H. Freeman, W. J. Weaver, Jr., Mitchael C. Freeman, Robert Dieter, Andrea Baschirotto, Piero Malcovati, Marco Grassi, Glenn Noufer, Randall L. Sandusky, Neaz E. Farooqi, Jim Devoy, Silvia Jaeckel, Madison Hayes Yarbro Freeman
  • Patent number: 9557226
    Abstract: Described is a current-mode thermal sensor apparatus which comprises: a first transistor with a gate terminal coupled to a first node; a second transistor with a gate terminal coupled to a second node; a first resistor coupled to the first and second nodes; a second resistor coupled to the first node and a supply node; and a diode coupled to the second node and the supply node.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: January 31, 2017
    Assignee: Intel Corporation
    Inventor: Matthias Eberlein
  • Patent number: 9541455
    Abstract: The electronic device comprises a substrate provided with a surface comprising a region of interest, the thermal behavior of which is to be monitored, and a system for detecting hot spots located in the region of interest. The system for detecting hot spots comprises at least three separate heat flow meters arranged on the surface of the substrate outside of the region of interest.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: January 10, 2017
    Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Tristan Caroff, Vincent Remondière
  • Patent number: 9411354
    Abstract: A device of triggering and generating temperature coefficient current for generating a temperature coefficient current includes a positive temperature coefficient current generating unit, for generating a first positive temperature coefficient current, a negative temperature coefficient current generating unit, for generating a first negative temperature coefficient current, and a triggering unit, for triggering to generate the temperature coefficient current according to a triggering temperature and a current difference between the first positive temperature coefficient current and the first negative temperature coefficient current.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: August 9, 2016
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Min-Hung Hu, Chen-Tsung Wu
  • Patent number: 9118245
    Abstract: Systems and methods for digital voltage compensation in a power supply integrated circuit are provided. In at least one embodiment, a method includes receiving a digital voltage code, the digital voltage code corresponding to an output voltage value; setting an output count on a first counter to change from a present first digital count corresponding to a present voltage code value toward a target first digital count corresponding to a new voltage code value; and setting a second count to an offset count value on a second counter when the new voltage code value is received. The method also includes combining the second count with the output count to form a combined count value; and decrementing the second count value from the offset count value to zero when the first counter reaches the target first digital count.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: August 25, 2015
    Assignee: Intersil Americas LLC
    Inventor: Robert H. Isham
  • Patent number: 8981833
    Abstract: Low-power circuits for providing stable voltage and current references rely on currents flowing through ultra-thin dielectric layer components for operation. A current reference circuit includes driving circuitry operative to apply a voltage to the first terminal of the component with respect to the second terminal of the component in order to cause a current to flow through the dielectric layer, and sources a reference output current that is based on the current flow through the dielectric layer in response to the applied voltage. A voltage reference circuit includes a current source which applies a current to the ultra-thin dielectric layer component, and maintains an output node at a stable reference output voltage level based on the voltage across the ultra-thin dielectric layer component in response to the current flow through the dielectric layer.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: March 17, 2015
    Assignee: Dust Networks, Inc
    Inventors: Mark Alan Lemkin, Thor Nelson Juneau
  • Patent number: 8981736
    Abstract: This document discusses, among other things, apparatus for high-efficiency, thermally-compensated regulators. In an example, a regulator can include a zener diode having a first temperature coefficient, the zener diode configured couple to an output and to provide at least a portion of a reference voltage, a transistor having a second temperature coefficient, the transistor configured to receive the reference voltage, to receive a representation of the output, and to provide feedback information indicative of an error of the output using the representation of the output voltage and the reference voltage, and wherein the first temperature coefficient and the second temperature coefficient are configured to reduce at least a portion of a temperature drift effect of the zener diode and the transistor.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: March 17, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Richard A. Dunipace
  • Patent number: 8947064
    Abstract: An electronic switch is connected in series with a load dependent on an input signal. The electronic switch is operated in a first operation mode for a first time period after a signal level of the input signal has changed from an off-level to an on-level. The first operation mode includes driving the electronic switch dependent on a voltage across the load and dependent on a temperature of the electronic switch. The electronic switch is operated in a second operation mode after the first time period. The second operation mode includes driving the electronic switch dependent on the temperature according to a hysteresis curve.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: February 3, 2015
    Assignee: Infineon Technologies Austria AG
    Inventor: Martin Feldtkeller
  • Patent number: 8941370
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Doplan Audio, LLC
    Inventor: David Cave
  • Patent number: 8907650
    Abstract: This invention involves a bandgap reference circuit in IC. The temperature coefficient of conventional bandgap reference is large and the higher order compensation is difficult to implement. This invention provides an adaptive compensated bandgap reference which solves the problem only using lower order (first order) temperature coefficient compensation. The invention adopts segmental compensation circuit to realize adaptive segmental compensation of bandgap reference with low temperature coefficient. The technical solution includes traditional bandgap voltage reference circuit and adaptive feedback compensation circuit which consists of sample and hold circuit, voltage comparator and control module. This invention controls the bandgap voltage reference through systematical view and it has high process compatibility.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: December 9, 2014
    Assignee: University of Electronic Science and Technology of China
    Inventors: Shaowei Zhen, Ping Luo, Ruhui Yang, Kang Yang, Bo Zhang
  • Patent number: 8868949
    Abstract: Embodiments of the present invention relate to limiting maximum power dissipation occurred in a processor. Therefore, when an application that requires excessive amounts of power is being executed, the execution of the application may be prevented to reduce dissipated or consumed power.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: October 21, 2014
    Assignee: Cavium, Inc.
    Inventors: David A. Carlson, Richard E. Kessler
  • Patent number: 8803588
    Abstract: A temperature compensation circuit is disclosed. A temperature compensation circuit may include a temperature coefficient generator configured to generate a first signal and a second signal, wherein the first signal is proportional-to-absolute-temperature (ptat) and the second signal is negatively-proportional-to-absolute-temperature (ntat), a first programmable element configured to multiply at a first programmable ratio an amplitude of a third signal having a negative temperature coefficient from a first temperature to a second temperature, and a second programmable element configured to multiply at a second programmable ratio an amplitude of a fourth signal having a positive temperature coefficient from the second temperature to a third temperature.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: August 12, 2014
    Assignee: Intel IP Corporation
    Inventor: Darin Dung Nguyen
  • Patent number: 8791683
    Abstract: A monolithic voltage reference circuit may include a voltage-mode band-gap reference circuit, a temperature independent differential current source, and a temperature dependent differential current source. The voltage-mode band-gap reference circuit may include an error amplifier having differential input nodes. The temperature independent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature independent differential current with an allocation between the nodes that is controlled by a selectable output voltage trim setting. The temperature dependent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature dependent differential current with an allocation between the nodes that is controlled by a selectable temperature drift trim setting.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: July 29, 2014
    Assignee: Linear Technology Corporation
    Inventors: Edson Wayne Porter, Iulian Constantin Gradinariu
  • Patent number: 8766611
    Abstract: A reference voltage generation circuit includes: a bandgap reference circuit, generating a plurality of initial currents with different temperature coefficients; a base voltage generation circuit, combining the initial current into a combined current, and converting the combined current into one or more base voltages; a bias current source circuit, generating one or more bias currents based on at least one of the initial currents; and one or more regulating output circuit, each converting a respective one of the one or more bias currents into an increment voltage and adding the increment voltage to the base voltage to generate a respective output voltage. Each output voltage may have its respective temperature coefficient.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: July 1, 2014
    Assignee: Novatek Microelectronics Corp.
    Inventors: Min-Hung Hu, Chen-Tsung Wu, Zhen-Guo Ding, Pin-Han Su
  • Patent number: 8760143
    Abstract: One embodiment provides a reference current generation circuit. The circuit has first and second reference current generation circuits for generating first and second reference currents respectively, and a current output circuit for outputting a third reference current by adding the first and second reference currents. The first reference current generation circuit includes first and second current-voltage conversion circuits and a first current supply circuit. The first current supply circuit provides substantially equal amounts of current to the first and second current-voltage conversion circuits respectively. The second reference current generation circuit includes third to fifth current-voltage conversion circuits and a second current supply circuit.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yuji Satoh
  • Patent number: 8754624
    Abstract: A voltage converter includes a switching element, a control unit and a generation unit. The switching element controls an output voltage of the voltage converter. The control unit is configured to control the switching element based on a voltage signal. The generation unit is configured to generate the voltage signal by serially connecting a resistance element and one or more detection units having a resistor corresponding to a temperature and dividing a reference voltage by the detection units and the resistance element. The generation unit is arranged so as to be able to detect temperature change of a plurality of components which is overheat-protected.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: June 17, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Sato
  • Patent number: 8749219
    Abstract: A current generating circuit may include a first current source configured to generate a first current having positive temperature characteristics; a second current source configured to generate a second current; a compensation transistor configured as an NPN bipolar transistor, and arranged such that the second current flows through from its collector and its emitter; and a first current mirror circuit configured to multiply a base current of the compensation transistor by a first coefficient so as to generate a third current. The current generating circuit may be configured to output a fourth current that is proportional to the difference between the first current and the third current.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: June 10, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Hiroki Kikuchi
  • Patent number: 8723502
    Abstract: A bandgap reference voltage generator is provided. In one embodiment, the bandgap reference voltage generator includes a first current generator, a second current generator, and an output voltage generator. The first current generator generates a first current with a positive temperature coefficient. The second current generator generates a second current with a negative temperature coefficient. The output voltage generator generates a third current with a level equal to that of the first current, generates a fourth current with a level equal to that of the second current, adds the third current to the fourth current to obtain a combined current with a zero temperature coefficient, and generates a reference voltage according to the combined current.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: May 13, 2014
    Assignee: Silicon Motion, Inc.
    Inventors: Hui-Ju Chang, Shuo-Jyun Hong
  • Patent number: 8717051
    Abstract: Systems and methods for managing process and temperature variations for on-chip sense resistors are disclosed. The system includes a circuit that can leverage a linear gm circuit in order to provide linear gains (positive gains and/or negative gains). The linearity of the circuit enables compensation for temperature and process variations across an entire range of current (positive to negative). A control signal is generated by using a linear gm amplifier and a replica resistor, which is substantially similar to the on chip resistor. The control signal is used to control the gain of a disparate linear gm amplifier within a compensation circuit, which provides an offset voltage to compensate for the variation in resistance of the on chip resistor.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: May 6, 2014
    Assignee: Intersil Americas Inc.
    Inventor: Patrick Sullivan
  • Patent number: 8710812
    Abstract: A method of regulating a supply voltage (Vgg) provided to a load circuit. The method can include generating at least one reference voltage (Vr1, Vr2, Vr3) having a negative voltage-temperature coefficient. The method further can include applying the reference voltage as a bias voltage (Vbias) to a current sink that is electrically coupled in parallel with a path of a leakage current (Ileak) drawn by the load circuit. A related voltage regulator can include a current sink that is electrically coupled in parallel with a path of a leakage current drawn by a load circuit, and a bias control circuit that generates at least one reference voltage having a negative voltage-temperature coefficient and applies the reference voltage as a bias voltage to a current sink.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: April 29, 2014
    Assignee: Xilinx, Inc.
    Inventor: Eric E. Edwards
  • Patent number: 8696199
    Abstract: A temperature sensor circuit and system providing accurate digital temperature readings using a local or remote temperature diode. In one set of embodiments a change in diode junction voltage (?VBE) proportional to the temperature of the diode is captured and provided to an analog to digital converter (ADC), which may perform required signal conditioning functions on ?VBE, and provide a digital output corresponding to the temperature of the diode. DC components of errors in the measured temperature that may result from EMI noise modulating the junction voltage (VBE) may be minimized through the use of a front-end sample-and-hold circuit coupled between the diode and the ADC, in combination with a shunt capacitor coupled across the diode junction. The sample-and-hold-circuit may sample VBE at a frequency that provides sufficient settling time for each VBE sample, and provide corresponding stable ?VBE samples to the ADC at the ADC operating frequency.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: April 15, 2014
    Assignee: Standard Microsystems Corporation
    Inventors: Robert St. Pierre, Scott C. McLeod
  • Patent number: 8680840
    Abstract: A reference circuit includes a first transistor having a first current electrode, a control electrode, and a second current electrode coupled to a power supply terminal. The reference circuit further includes a resistive element including a first terminal coupled to the control electrode of the first transistor and a second terminal coupled to the first current electrode. Additionally, the reference circuit includes a second transistor including a first current electrode coupled to the second terminal of the resistive element, a control electrode coupled to the second terminal, and a second current electrode coupled to the power supply terminal. The second transistor is configured to produce an output signal related to a voltage at the control electrode of the first transistor.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: March 25, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Radu H. Iacob, Marian Badila
  • Patent number: 8602645
    Abstract: A temperature detection system includes a power semiconductor device, a chip temperature detection device for detecting a temperature of the power semiconductor device, loss-related characteristic value acquiring means for acquiring a loss-related characteristic value that is a characteristic to decide a loss of the power semiconductor device, difference value calculating means for calculating, from the loss-related characteristic value, a difference value between the temperature of the power semiconductor device and a temperature detected by the chip temperature detection device, a corrected temperature signal generating part for generating a corrected temperature signal by adding the temperature detected by the chip temperature detection device and the difference value, and an output part for outputting the corrected temperature signal to the outside.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Noboru Miyamoto, Akira Yamamoto
  • Patent number: 8593449
    Abstract: A reference voltage generation circuit of the disclosure includes a first amplifier circuit and a second amplifier circuit. The first amplifier circuit includes a first input stage including two npn transistors or two NMOS transistors having base terminals or gate terminals to which a variable voltage and a predetermined lower limit voltage are inputted. A first output stage includes a pnp transistor or a PMOS transistor having an emitter terminal or a source terminal connected to an output terminal of a reference voltage. A first amplifier stage controls the first output stage for equalizing the higher one of the variable voltage and the lower limit voltage with the reference voltage.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: November 26, 2013
    Assignee: Rohm Co., Ltd.
    Inventor: Kazuhiro Murakami
  • Patent number: 8575912
    Abstract: The present invention discloses a circuit for generating a dual-mode proportional to absolute temperature (PTAT) current. The circuit includes a voltage stabilizing circuit to provide a voltage reference, and a load current control circuit comprising a first transistor to provide a first load current based on the voltage reference, a second transistor to provide a second load current based on the voltage reference, a first switch to control whether to allow the first load current to flow therethrough in response to different predetermined temperatures, and a second switch to control whether to allow the second load current to flow therethrough in response to the different predetermined temperatures. A resultant current resulting from at least one of the first load current or the second load current has different current magnitudes at the different predetermined temperatures.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: November 5, 2013
    Assignee: Elite Semiconductor Memory Technology Inc.
    Inventor: Ming-Sheng Tung
  • Patent number: 8552795
    Abstract: A substrate bias control circuit includes a process voltage temperature (PVT) effect transducer that responds to a PVT effect. A PVT effect quantifier is coupled to the PVT effect transducer. The PVT effect quantifier quantifies the PVT effect to provide an output. The PVT effect quantifier includes at least one counter and a period generator. The period generator provides a time period for the counter. A bias controller that is coupled to PVT effect quantifier is configured to receive the output of the PVT effect quantifier. The bias controller is configured to provide a bias voltage. The bias controller includes a bias voltage comparator.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: October 8, 2013
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Shyh-An Chi, Shiue Tsong Shen, Jyy Anne Lee, Yun-Han Lee
  • Patent number: 8552693
    Abstract: A battery cell charging system, including a charger and a controller, for low-temperature (below about zero degrees Celsius) charging a lithium ion battery cell, the battery cell charging system includes: a circuit for charging the battery cell using an adjustable voltage charging-profile to apply a charging voltage and a charging current to the battery cell wherein the adjustable voltage charging-profile having: a non-low-temperature charging stage for charging the battery cell using a charging profile adapted for battery cell temperatures above about zero degrees Celsius; and a low-temperature charging stage with a variable low-temperature stage charging current that decreases responsive to a battery cell temperature falling below zero degrees Celsius.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: October 8, 2013
    Assignee: Tesla Motors, Inc.
    Inventor: Anil Paryani
  • Patent number: 8536932
    Abstract: A temperature compensation circuit may include a temperature coefficient generator configured to generate a first signal and a second signal, wherein the first signal is proportional-to-absolute-temperature (ptat) and the second signal in negatively-proportional-to-absolute temperature (ntat), a first programmable element configured to multiply at a first programmable ratio an amplitude of a third signal having a negative temperature coefficient from a first temperature to a second temperature, and a second programmable element configured to multiply at a second programmable ratio an amplitude of a fourth signal having a positive temperature coefficient from the second temperature to a third temperature.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 17, 2013
    Assignee: Intel IP Corporation
    Inventor: Darin Dung Nguyen
  • Patent number: 8508283
    Abstract: Back-gate voltage control provides a high speed and low power consumption LSI operable in a wide temperature range in which a MOS transistor having back gates is used specifically according to operating characteristics of a circuit. In the LSI, an FD-SOI structure having an embedded oxide film layer is used and a lower semiconductor region of the embedded oxide film layer is used as a back gate. A voltage for back gates in logic circuits having a small load in logic circuit block is controlled in response to activation of the block from outside of the block. Transistors, in which the gate and the back gate are connected to each other, are used for the circuit generating the back gate driving signal, and logic circuits having a heavy load such as circuit block output section, and the back gates are directly controlled according to a gate input signal.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: August 13, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Takayuki Kawahara, Masanao Yamaoka
  • Patent number: 8495395
    Abstract: A system includes a plurality of processor cores and a power management unit. The power management unit may be configured to independently control the performance of the processor cores by selecting a respective thermal power limit for each of the plurality of processor cores dependent upon an operating state of each of the processor cores and a relative physical proximity of each processor core to each other processor core. In response to the power management unit detecting that a given processor core is operating above the respective thermal power limit, the power management unit may reduce the performance of the given processor core, and thereby reduce the power consumed by that core.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: July 23, 2013
    Assignee: Advanced Micro Devices
    Inventor: Samuel D. Naffziger
  • Patent number: 8487588
    Abstract: A battery pack is disclosed that includes a plurality of battery cells and a plurality of temperature sensors. Each of the temperature sensors is for sensing a temperature of a corresponding one or more of the battery cells to generate a temperature signal, and the temperature sensors are divided into groups of temperature sensors. A plurality of A/D converters is provided, and each of the A/D converters is coupled to a corresponding one of the groups of temperature sensors to convert the temperature signal into a digital signal. An identification signal module is coupled to the A/D converters for applying different identification signals to the plurality of A/D converters, respectively. A controller is coupled to the A/D converters for receiving the identification signals and the temperature signal, and for identifying a temperature of each of the battery cells through the identification signals.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: July 16, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hanseok Yun, Susumu Segawa, Tetsuya Okada, Euijeong Hwang, Sesub Sim, Beomgyu Kim, Jinwan Kim
  • Patent number: 8466685
    Abstract: The method includes the simultaneous measurement of the current I, of the positive plate potential V+, and of the temperature T at the positive terminal of the battery, the determination of a temperature compensated value Vc+ of the positive plate potential and the use of the temperature compensated value Vc+ for estimation of the state of charge. This method is more particularly used for estimation of the state of charge of an alkaline battery having a NiOOH positive plate.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: June 18, 2013
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventor: Angel Zhivkov Kirchev
  • Patent number: 8466666
    Abstract: A multi-stage voltage regulating circuit and method with automatic temperature compensation comprises a plurality of charge-pumps, a temperature compensator, a comparative unit and a control logic circuit; wherein, the temperature compensator detects the ambient temperature and outputs a reference voltage related to the ambient temperature, the comparative unit compares the voltage of the output power source to the reference voltage output by the temperature compensator and outputs a comparative signal based on the comparison, and the control logic circuit controls the charging/discharging operations of the charge-pumps based on the comparative signal and voltages of input power sources connected to said charge-pumps to automatically regulate the voltage of the output power source.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 18, 2013
    Assignee: Richtek Technology Corp.
    Inventors: Der-Jiunn Wang, Kuo-Chen Tsai
  • Patent number: 8441246
    Abstract: A temperature independent type reference current generating device and methods thereof. A temperature independent type reference current generating device may include a first reference current generator generating a first reference current having a first element decreasing according to a temperature, a second reference current generator generating a second reference current having a second element increasing according to the temperature, and/or mirroring and outputting a second reference current and/or a mirrored second reference current. A temperature independent type reference current generating device may include a first current mirror mirroring a first reference current and/or outputting a mirrored first reference current, and a second current mirror adding a mirrored first reference current and a mirrored second reference current, and/or mirroring a result of an addition to output a mirrored result as an output reference current.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: May 14, 2013
    Assignee: Dongbu Hitek Co., Ltd.
    Inventor: Seung-Hun Hong
  • Patent number: 8421434
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: April 16, 2013
    Assignee: Dolpan Audio, LLC
    Inventor: David Cave
  • Patent number: 8405376
    Abstract: A low noise reference voltage circuit without using an amplifier inside is capable of transforming a current IPTAT in positive proportion to absolute temperature into a voltage VPTAT in positive proportion to absolute temperature, and outputting it to a ring oscillator. The low noise reference voltage circuit improves a degradation of noise performance compared with a conventional band-gap reference voltage circuit and is in characteristic of low noise and higher PSRR.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: March 26, 2013
    Assignee: FCI Inc.
    Inventors: In-chul Hwang, Myung-woon Hwang, Je-cheol Moon, Hyun-ha Jo
  • Patent number: 8390265
    Abstract: A reference voltage generating circuit in a semiconductor memory apparatus comprises a driving control signal generating unit configured to generate a driving control signal according to a temperature variation, wherein the driving control signal generating unit is enabled in response to a power-up signal, a driving unit configured to control a voltage level, which is applied to a voltage transfer node, in response to the power-up signal and the driving control signal, and a reference voltage generating unit configured to generate a reference voltage when a voltage level on the voltage transfer node is higher than a predetermined voltage level.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: March 5, 2013
    Assignee: SK Hynix Inc.
    Inventor: Dong Keum Kang
  • Patent number: 8370674
    Abstract: Computing and server power supplies are typically sized larger to deliver the maximum power the system may need. However since systems are not often used to capacity a smaller power supply may be used in conjunction with a thermal sensor to monitor a critical component of the power supply defined as the particular component within the power supply whose temperature reaches its maximum allowed limit sooner than any other power supply component when the average (continuous) power may exceed the power supply's max rating. When a critical temperature has been reached, an interrupt signal is generated by the power supply to signal the host to throttle back until the temperature comes back into an acceptable range.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: February 5, 2013
    Assignee: Intel Corporation
    Inventor: Viktor D. Vogman
  • Patent number: 8358119
    Abstract: A current reference circuit includes a proportional-to-absolute temperature (PTAT) current generator, a band-gap reference circuit and a current replication circuit. The PTAT generator generates a PTAT current. The band-gap reference circuit generates a reference voltage based on the PTAT current and generates a second current by cancelling a first current from the PTAT current. The first current has a zero temperature coefficient and the second current has a positive temperature coefficient. The current replication circuit replicates the first current based on the PTAT current and the second current.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: January 22, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyoung-Rae Kim
  • Patent number: 8350555
    Abstract: A method and apparatus for generating a low reference voltage having low power consumption characteristics is provided. A reference voltage generating apparatus includes a constant current source circuit which generates a reference current. A load circuit is connected to the constant current source circuit and generates a voltage which is proportional to the reference current. A current branch circuit removes a portion of temperature-invariant current components included in the reference current from a connection terminal of the constant current source circuit and the load circuit to a ground terminal through a current branch which is different from a current branch of the load circuit.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: January 8, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyoung-Rae Kim, Hyo-Sun Kim
  • Patent number: 8351223
    Abstract: A secondary circuit of a flyback power converter has a resistor network to monitor the output current of the flyback power converter, so as to generate a voltage to apply to a base of a bipolar junction transistor to thereby provide a collector signal for output feedback. The resistor network has a temperature-dependent resistance to compensate the temperature dependence of the base-emitter voltage imparted to the output current and thereby stable the output current.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: January 8, 2013
    Assignee: Richpower Microelectronics Corporation
    Inventors: Ke-Chih Chou, Pei-Lun Huang
  • Patent number: 8330476
    Abstract: A supply voltage management system and method for an integrated circuit (IC) die are provided. The supply voltage management system includes one or more temperature sensing elements located on the IC die and configured to sense temperature of the die and to output a sensed temperature value for the die. A dynamic voltage controller is located on the die and is configured to receive the sensed temperature value for the die and to identify a technology process category of the die. Based on the sensed temperature value and the identified technology process category of the die, the dynamic voltage controller adjusts an output voltage to at least one circuit of the die.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: December 11, 2012
    Assignee: ATI Technologies ULC
    Inventors: Nancy Chan, Ramesh Senthinathan
  • Patent number: 8330445
    Abstract: Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO) with low 1/f noise. A first base-emitter voltage branch is used to produce a first base-emitter voltage (VBE1). A second base-emitter voltage branch is used to produce a second base-emitter voltage (VBE2). The circuit also includes a first current preconditioning branch and/or a second current preconditioning branch. The VPTAT is produced based on VBE1 and VBE2. A CTAT branch can be used to generate a voltage complimentary to absolute temperature (VCTAT), which can be added to VPTAT to produce VGO. Which transistors are in the first base-emitter voltage branch, the second base-emitter voltage branch, the first current preconditioning branch, the second current pre-conditioning branch, and the CTAT branch changes over time.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: December 11, 2012
    Assignee: Intersil Americas Inc.
    Inventor: Steven G. Herbst