With Resistor Sensor Patents (Class 361/91.2)
  • Patent number: 11728678
    Abstract: A method for regulating input impedance of a switching regulator, the method comprising: obtaining, at an impedance controller: (a) a measured voltage value that is indicative of an input current of the switching regulator and (b) an input voltage of the switching regulator, wherein a ratio of the input voltage to the input current defines an actual input impedance of the switching regulator; generating a control signal by the impedance controller, in accordance with a difference between the actual input impedance of the switching regulator and a desired input impedance of the switching regulator, wherein the desired input impedance is a predefined impedance; and controlling a feedback node feeding the switching regulator, in accordance with the control signal, to realize an output voltage of the switching regulator for achieving the desired input impedance, wherein the feedback node is external to the switching regulator, thereby regulating the input impedance of the switching regulator externally to the swi
    Type: Grant
    Filed: November 10, 2019
    Date of Patent: August 15, 2023
    Assignee: Connected Intelligence Systems Ltd.
    Inventor: Eyal Doron
  • Patent number: 11710526
    Abstract: A memory system includes a connector through which power for the memory system is to be supplied from an external device, a controller, a nonvolatile memory device, a power source circuit connected to the controller and the nonvolatile memory device by power lines through which power is supplied to the controller and the nonvolatile memory device, and a power source control circuit that receives a supply of power from the external device through the connector and supplies the power to the power control circuit. The power source control circuit is configured to detect using a divided voltage of a voltage of the power supplied thereto, that the voltage of the power supplied thereto is higher than a predetermined voltage and interrupt the power supplied to the power control circuit if the voltage of the power supplied thereto is higher than the predetermined voltage.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: July 25, 2023
    Assignee: Kioxia Corporation
    Inventor: Naoki Kimura
  • Patent number: 11646568
    Abstract: Embodiments of the present disclosure provide an over-voltage protection method, an over-voltage protection device and a display device. When the voltage value of the output signal is greater than the first preset voltage threshold, it is determined whether the voltage value of the output signal meets the preset over-voltage protection condition. If the voltage value of the output signal is detected to meet the preset over-voltage protection condition, the first control signal is output to stop output of the output signal or lower the voltage value of the output signal.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: May 9, 2023
    Assignees: CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., HKC CORPORATION LIMITED
    Inventors: Dekang Zeng, Shuixiu Hu
  • Patent number: 11322928
    Abstract: Embodiments of the present disclosure provide an over-voltage protection method, an over-voltage protection device and a display device. When the voltage value of the output signal is greater than the first preset voltage threshold, it is determined whether the voltage value of the output signal meets the preset over-voltage protection condition. If the voltage value of the output signal is detected to meet the preset over-voltage protection condition, the first control signal is output to stop output of the output signal or lower the voltage value of the output signal.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: May 3, 2022
    Assignees: CHONGQING HKC OFTOELECTRONICS TECHNOLOGY CO., LTD., HKC CORPORATION LIMITED
    Inventors: Dekang Zeng, Shuixiu Hu
  • Patent number: 11223198
    Abstract: The submitted voltage limiter consists of the insulating shell (26), closed from the top by the electrically and thermally conductive first contact plate (2) provided with the first connecting point (1) and from the bottom by the electrically and thermally conductive second contact plate (10) provided with the second connecting point (9). The embodiment of the two triggering semiconductor elements (5, 13) oriented in opposing directions and the protection member (17) connected to it in parallel, located between the two inner plates (3, 11), is located inside the insulating shell (26). The semiconductor elements (5, 13) are simultaneously interconnected with the electronic control device and connecting points (1, 9). The limiter is equipped with compressive construction to provide clamping and electrical interconnection of individual parts.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: January 11, 2022
    Assignee: SALTEK S.R.O.
    Inventors: Jaromir Suchy, Jaroslav Ruzicka, Pavel Bocheza
  • Patent number: 10693325
    Abstract: A contactless power transfer apparatus includes an E-class amplifier having a coil configured to store an amount of energy for use in contactless power transfer and a field-effect transistor for controlling a current that flows in the coil, and an arrester provided between a drain terminal and a source terminal of the field-effect transistor and configured to be operated in response to application of a voltage having a voltage value lower than an absolute maximum rated voltage value between the drain and the source of the field-effect transistor.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: June 23, 2020
    Assignee: Hosiden Corporation
    Inventors: Eiji Sato, Hiroshi Ema
  • Patent number: 9007737
    Abstract: The overvoltage protection circuit in accordance with the present invention includes a resistor divider, a reference voltage supply unit, a comparator, and an inverter, wherein the inverter consists of a series-parallel combination circuit of first to third semiconductor switching elements which are driven by receiving an output of the comparator and the first semiconductor switching element and the second semiconductor switching element or the third semiconductor switching element are driven by receiving the output of the comparator, output an external voltage when the external voltage is within the range of the voltage required for an internal circuit, and flow the external voltage to a ground and thus make the voltage supplied to the internal circuit 0(zero)V to protect the internal circuit from an external overvoltage when the external voltage is a voltage (overvoltage) higher than the required voltage for the internal circuit.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 14, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd
    Inventor: Soo Woong Lee
  • Patent number: 8913361
    Abstract: An overvoltage protection circuit is configured to protect a battery pack from overvoltage when the battery pack is in charge. The overvoltage protection circuit includes a power supply, an overvoltage protection chip, a controller and switching circuit. The power supply is configured to charge the battery pack. The overvoltage protection chip is electronically connected between the power supply and the battery pack, the overvoltage protection chip comprising a voltage detection pin. The controller is electronically connected to the battery pack and configured to detect whether the battery pack is a high voltage type battery pack or a normal voltage type battery, and outputting corresponding control signals according to the detection. The switching circuit comprises a switch and two voltage dividing circuits, the switch connecting a corresponding voltage dividing circuit to the positive pole of the battery pack and the voltage detection pin under control of the control signal.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: December 16, 2014
    Assignees: Shenzhen Futaihong Precision Industry Co., Ltd., Chi Mei Communication Systems, Inc.
    Inventor: Ying-Zheng Li
  • Patent number: 8896976
    Abstract: There is provide an inverter protection device including: a reference voltage obtaining unit obtaining a reference voltage signal based on output current from an inverter module; a filtering unit removing noise from the reference voltage signal to output the filtered signal; a sensing unit sensing the filtered signal through a sensing terminal; an electrostatic discharge diode provided between the sensing terminal and a ground; and a bypass unit provided between one terminal of the electrostatic discharge diode and the ground.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: November 25, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Min Gyu Park
  • Patent number: 8878460
    Abstract: A protection circuit of a DC-DC converter is disclosed. An input terminal of the DC-DC converter receives an input voltage and an output terminal of the DC-DC converter provides an output voltage. The DC-DC converter includes an output stage between the input terminal and the output terminal. The protection circuit includes a current sensor, a comparator, a determining circuit, and a protection control circuit. The current sensor provides a sensing signal. The comparator compares a default over-voltage with the sensing signal to provide an over-current control signal. The determining circuit provides a determining control signal. The protection control circuit determines whether to enable a short protection according to the over-current control signal and the determining control signal.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: November 4, 2014
    Assignee: UPI Semiconductor Corporation
    Inventor: Wen-Fu Lu
  • Publication number: 20140313626
    Abstract: A programmable system includes a first level protection circuit comprised of discharge tube CR1/CR2 and piezoresistor MOV1/MOV2 in series; a second-level protection circuit comprised of the series arm of capacitor C1 and resistor R1 in parallel with a transient voltage suppression diode TVS1, and inductors L1/L2 connected to the ends of first level and second-level protection circuits respectively. A control circuit includes a PWM driver module and a SCM. The PWM driver module is connected to the PWM control port of the SCM and its output is connected to an IGBT module. The control circuit is also connected to a series communication module and to a user interface. The features of the invention are: strong-shock resistance; a wide range of load adaptability; and ability of accurately and steplessly regulating and adjusting with high frequency and high power load.
    Type: Application
    Filed: April 20, 2013
    Publication date: October 23, 2014
    Inventor: Xiaobao Wang
  • Patent number: 8861163
    Abstract: According to one embodiment, there is provided a protection relay. The protection relay includes an input circuit that detects a state of an external device according to whether or not an external input voltage is larger than a preset threshold voltage. The input circuit includes switching unit that is made conductive by a divided voltage obtained by voltage-dividing resistors that divide the external input voltage when the external input voltage is higher than or equal to the threshold voltage, and a photocoupler that is operated by a constant current of a constant current output circuit supplying a constant current and outputs an operation signal to the operation unit when the switching unit is made conductive.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: October 14, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroyuki Shirakawa, Yusuke Yanagihashi, Hiroyuki Maehara, Toshio Tanaka, Noriyoshi Suga, Itsuo Shuto
  • Patent number: 8861158
    Abstract: A circuit includes first logic that generates a first signal suitable to activate at least one ESD clamp in response to an electrostatic discharge (ESD) event having a first severity or a second severity higher than the first severity, and second logic that generates a second signal suitable to activate the ESD clamp in response to the ESD event having the second severity, the second signal time multiplexed with the first signal.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: October 14, 2014
    Assignee: Cypress Semiconductor Corporation
    Inventor: Dan Zupcau
  • Publication number: 20140285937
    Abstract: A circuit and method of over-voltage protection is provided to prevent the power supply to provide an exorbitant voltage to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger; said circuit comprises a DC input terminal, a DC output terminal, a voltage sampling circuit, a switch control circuit and a switch circuit; the voltage sampling circuit is electrically connected with the DC input terminal and the switch control circuit respectively; the switch control circuit is electrically connected with the switch circuit; the switch circuit is electrically connected with the DC input terminal, the DC output terminal and the switch control circuit respectively. When implementing the present invention, an exorbitant voltage can be prevented to provide to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger by the power supply, thus being protected from over-voltage as the exorbitant voltage may damage the products.
    Type: Application
    Filed: April 25, 2013
    Publication date: September 25, 2014
    Inventor: Zhiyong Xiang
  • Patent number: 8836404
    Abstract: In one embodiment, a circuit includes a resistance including first and second terminals. The first terminal of the resistance is coupled to ground. The circuit also includes a first switching element including first, second, and third terminals. The first terminal of the first switching element is coupled to an output of an integrated circuit and the second terminal of the first switching element is coupled to a voltage supply of the integrated circuit. Additionally, the circuit includes a second switching element including first, second, and third terminals. The first terminal of the second switching element is coupled to an enable input of the integrated circuit. Furthermore, the second terminal of the second switching element is coupled to the third terminal of the first switching element and to the second terminal of the resistance. Moreover, the third terminal of the second switching element is coupled to the ground.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: September 16, 2014
    Assignee: Vishay-Siliconix
    Inventor: Trang Vu
  • Publication number: 20140247529
    Abstract: An apparatus comprises a sensor having a sensing film and at least two electrodes; and a plurality of electronic components operably associated with the sensor. The sensing film is configured to provide a signal based on humidity immediately prior to contact with liquid water. The electronic components are configured to provide a change in output voltage to trigger an electronic switch that disconnects an electronic device from a power source.
    Type: Application
    Filed: March 4, 2013
    Publication date: September 4, 2014
    Applicant: Nokia Corporation
    Inventors: Stefano M. Borini, Richard White, Jani Kivioja, Michael R. Astley, Christopher Bower
  • Patent number: 8823439
    Abstract: The semiconductor device includes a power element which is in an on state when voltage is not applied to a gate, a switching field-effect transistor for applying first voltage to the gate of the power element, and a switching field-effect transistor for applying voltage lower than the first voltage to the gate of the power element. The switching field-effect transistors have small off-state current.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama
  • Patent number: 8823351
    Abstract: A control system of a DC to DC converter skips switching pulses according to the output of an overvoltage protection circuit. The overvoltage protection circuit includes an overvoltage threshold voltage control section that lowers an overvoltage threshold voltage when the pulse width has a minimum valve. The control system both improves the output voltage accuracy of the DC to DC converter under a light load and promotes a quick return to normal operation after an overvoltage protection operation under a heavy load.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: September 2, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Kouhei Yamada
  • Patent number: 8767366
    Abstract: An apparatus and method is disclosed for providing an electrostatic discharge protection circuit for compound semiconductor devices and circuits. The electrostatic discharge protection circuit comprises a first terminal and a second terminal. The electrostatic discharge protection circuit further comprises a transistor shunt element that is operably coupled between the first terminal and the second terminal; the transistor shunt element is capable of providing a bi-directional discharge path between the first terminal and the second terminal. The electrostatic discharge protection circuit further comprises a shut-off element that is operably coupled with the second terminal; the shut-off element is capable of keeping the transistor shunt element turned-off.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 1, 2014
    Assignee: TriQuint Semiconductor, Inc.
    Inventors: Andrew T. Ping, Dominic J. Ogbonnah
  • Patent number: 8742826
    Abstract: According to one embodiment, an active clamp circuit includes a first switch element, a first diode, a first resistance, a first control circuit and a second control circuit. The first diode is connected to the first switch element and breaks down by an overvoltage applied to the first switch element. The first resistance is connected to the first diode and detects a current through the first diode. The first control circuit is configured to amplify a voltage across the first resistance and controls a current through the first switch element. The second control circuit is configured to control a conduction of the first switch element in accordance with the voltage across the first resistance.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: June 3, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miki Furuya, Satoru Kodama
  • Patent number: 8724278
    Abstract: This document discusses, among other things, systems and methods for detecting a charging current from a startup circuit to a controller without power loss from a voltage divider, and for providing information representative of the charging current to the controller.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: May 13, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Bc. Jan Grulich
  • Patent number: 8687334
    Abstract: A controller 43 turns on a semiconductor switch 41 in a normal mode, and turns off the semiconductor switch 41 in a sleep mode. A bypass resistor 5 is connected in parallel to the semiconductor switch 41. A resistance value of the bypass resister 5 is so large as that in the sleep mode, a dark current is supplied to an electronic device 3 via the bypass resistor 5, and if an electric wire downstream of the bypass resistor is short-circuited, an electric current more than a permissive current is prevented from flowing to the electric wire.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: April 1, 2014
    Assignee: Yazaki Corporation
    Inventors: Keisuke Ueta, Akinori Maruyama, Yoshihide Nakamura, Yoshinori Ikuta, Hideo Suganuma
  • Patent number: 8689033
    Abstract: A data processing device with a power supply and data signal interface circuit has a switch for connecting an external line and an internal node. The power supply and data signal interface circuit also includes a controller for applying an enabling voltage to the switch enabling the switch to supply current between the external line and the internal node in the presence of power supply to the controller and in the absence of the overvoltage condition on the external line. The power supply and data signal interface circuit also includes a voltage reduction connection from the external line for applying a control voltage to the switch in the absence of power supply to the controller. The control voltage from the voltage reduction connection limits a voltage applied to the internal node through the switch in the presence of the overvoltage condition.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: April 1, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Amit K. Srivastava, Parul K. Sharma
  • Patent number: 8674727
    Abstract: A circuit arrangement includes a transistor component with a gate terminal, a control terminal, and a load path between a source and a drain terminal. A drive circuit is connected to the control terminal and configured to determine a load condition of the transistor component, to provide a drive potential to the control terminal, and to adjust the drive potential dependent on the load condition.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: March 18, 2014
    Assignee: Infineon Technologies Austria AG
    Inventors: Anton Mauder, Franz Hirler, Frank Pfirsch
  • Patent number: 8665572
    Abstract: The present invention relates to a battery charge/discharge protection circuit that protects an associated battery from charge/discharge damage. The charge/discharge protection circuit includes a first terminal, a second terminal, a charge over-current detection circuit, a discharge over-current detection circuit, a short circuit detection circuit, and a PMOS transistor. A drain electrode and a gate electrode of the PMOS transistor are connected to the first terminal and the second terminal respectively. A source electrode of the PMOS transistor is connected to the charge over-current detection circuit, the discharge over-current detection circuit and the short circuit detection circuit, such that when a voltage above an overvoltage threshold is supported by the charger, the voltage of the source electrode of the PMOS transistor is maintained above a negative threshold voltage and the elements in these circuits do not receive such a voltage output by the charger.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: March 4, 2014
    Assignee: Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
    Inventor: Zutao Liu
  • Patent number: 8649137
    Abstract: In an embodiment a circuit provides protection against electrostatic discharge (ESD). A shunt device is controlled to provide a current bypass upon the occurrence of an ESD event. A trigger circuit controls operation of the shunt device and includes an inverter and a hysteresis means to prevent oscillation of the trigger circuit. A reference is used to trigger the control circuit and has a time constant associated with it to distinguish between power up events and ESD events.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: February 11, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Noureddine Senouci, Alexander Heubi
  • Patent number: 8643990
    Abstract: A protection circuit includes a controllable discharge element having a load path coupled between a first second circuit nodes. The discharge element provides a discharge path between the first and the second circuit nodes when in an on state. A trigger circuit has a first connection coupled to the first circuit node and a second connections coupled to the second circuit node. The trigger circuit is configured to produce a drive signal that switches the discharge element to its on state when the voltage between the first and the second circuit nodes reaches a trigger value. A setting circuit coupled to the trigger circuit is configured to change the trigger value from a first trigger value to a second trigger value depending on a voltage between the first and the second circuit nodes and/or on the drive signal.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: February 4, 2014
    Assignee: Infineon Technologies AG
    Inventors: Yiqun Cao, Herbert Gietler, Ulrich Glaser
  • Publication number: 20140022683
    Abstract: An electric equipment protection device includes a first conducting line and a second conducting line, connectable to a power source to receive a supply voltage of a rated value; at least one varistor, connected between the first conducting line and the second conducting line, and having a breakdown voltage; and a control stage cooperating with the varistor. The control stage includes at least one gas discharge device, an activation network of the gas discharge device and a diagnostic device.
    Type: Application
    Filed: February 22, 2012
    Publication date: January 23, 2014
    Inventor: Flavio Brasola
  • Patent number: 8634176
    Abstract: An overvoltage protector having a housing and at least one overvoltage limiter arranged in the housing, especially a gas-filled surge arrester (1), a suppressor diode (2) or a varistor. The functional ability and the state of the overvoltage protector can be controlled during operation by associating a monitoring component with the overvoltage limiter which detects a current (i) flowing over the overvoltage limiter component, and by providing an evaluation unit that evaluates the signal of the monitoring component.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: January 21, 2014
    Assignee: Phoenix Contact GmbH Co. KG
    Inventors: Friedrich-Eckhard Brand, Steffen Pfoertner, Bernd Pötzsch
  • Publication number: 20140002940
    Abstract: A switching device is configured to connect a split-phase power source to a load. The split-phase power source includes a first hot lead, a second hot lead, and a neutral lead. When the split-phase power source is generating power, the voltage between the first hot lead and the neutral lead closes a first contact and the voltage between the second hot lead and the neutral lead closes a second contact. The contacts are connected in series between the first hot lead, the second hot lead and a third switch. The voltage potential present between the first hot lead and the second hot lead closes a third and fourth contact. The third contact is connected in series between the first hot lead and the load and the fourth contact is connected in series between the second hot lead and the load. The switching device protects against open neutral conditions.
    Type: Application
    Filed: June 6, 2013
    Publication date: January 2, 2014
    Inventor: Neil A. Czarnecki
  • Publication number: 20130335873
    Abstract: The overvoltage protection circuit in accordance with the present invention includes a resistor divider, a reference voltage supply unit, a comparator, and an inverter, wherein the inverter consists of a series-parallel combination circuit of first to third semiconductor switching elements which are driven by receiving an output of the comparator and the first semiconductor switching element and the second semiconductor switching element or the third semiconductor switching element are driven by receiving the output of the comparator, output an external voltage when the external voltage is within the range of the voltage required for an internal circuit, and flow the external voltage to a ground and thus make the voltage supplied to the internal circuit 0(zero)V to protect the internal circuit from an external overvoltage when the external voltage is a voltage (overvoltage) higher than the required voltage for the internal circuit.
    Type: Application
    Filed: March 13, 2013
    Publication date: December 19, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Soo Woong Lee
  • Publication number: 20130335872
    Abstract: An overvoltage detection system includes a sensed voltage; an active reference module that generates an active reference signal having a magnitude that varies inversely with a magnitude of the sensed voltage; and a timed trip module that includes a resistor and capacitor, and detects an overvoltage condition as a function of the sensed voltage, the active reference signal, and time.
    Type: Application
    Filed: June 13, 2012
    Publication date: December 19, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Adrian E. Vandergrift
  • Patent number: 8570696
    Abstract: A protection circuit includes a switch circuit, a sample circuit, a comparison circuit, and a relay circuit. The switch circuit is connected between a hard disk power supply and a hard disk to control whether to output power from the hard disk power supply to the hard disk. The sample circuit samples the voltage being supplied to the hard disk, the comparison circuit receives the sampled voltage, compares the sampled voltage to a reference voltage, and controls the switch circuit to be turned on or off accordingly. The relay circuit is connected between a system power supply and an enable terminal of the comparison circuit. The relay circuit outputs a high level signal to turn on the switch circuit when the system power supply is being supplied and the hard disk power supply is not being supplied to the hard disk.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: October 29, 2013
    Assignees: Hon Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Wei-Dong Cong, Guo-Yi Chen
  • Patent number: 8547142
    Abstract: A power semiconductor device has: an output transistor connected between a power-supply terminal and an output terminal; a gate charge-discharge circuit configured to charge/discharge a first node connected to a gate of the output transistor to ON/OFF control the output transistor; a short switch circuit connected between the first node and the output terminal; and a short control circuit configured to control the short switch circuit. In the turn-ON period, the ON period and the turn-OFF period, the short control circuit cuts off electrical connection between the first node and the output terminal through the short switch circuit. In the OFF period, the short control circuit electrically connects the first node and the output terminal through the short switch circuit.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: October 1, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Akihiro Nakahara, Sakae Nakajima
  • Patent number: 8488288
    Abstract: Various embodiments of an input protection circuitry may be configured with a variable tripping threshold and low parasitic elements, which may prevent a signal from propagating into the protected equipment/device if the voltage of the input signal exceeds a certain limit. The input protection circuit may operate to protect a measurement instrument, which may be an oscilloscope, early in the signal path leading into to the instrument, to avoid exposing sensitive circuitry to damaging voltage levels, and without introducing significant parasitic elements that would degrade the performance of the instrument. The protection circuit may be configured to include clamping to provide protection during the circuit response delay time. The input protection threshold of the protection circuit may be adaptive to a selected voltage range on the instrument without trading-off instrument performance and features.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: July 16, 2013
    Assignee: National Instruments Corporation
    Inventors: Zaher G. Harb, Mark Whittington
  • Patent number: 8482320
    Abstract: The invention provides a current detection circuit for a transistor, that does not influence a current flowing through the transistor, and minimizes a power loss, an increase of the pattern area and so on. A current detection circuit includes a wiring connected to a MOS transistor and forming a current path of a current of the MOS transistor, a current detection MOS transistor of which the gate is connected to the wiring, that flows a current corresponding to the potential of the gate, and a current detector detecting a current flowing through the current detection MOS transistor. The current detection circuit is configured including a load resistor connected to the current detection MOS transistor and a voltage detection circuit detecting a drain voltage of the current detection MOS transistor.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: July 9, 2013
    Assignee: ON Semiconductor Trading, Ltd.
    Inventor: Seiji Otake
  • Publication number: 20130170086
    Abstract: An overvoltage protection circuit is configured to protect a battery pack from overvoltage when the battery pack is in charge. The overvoltage protection circuit includes a power supply, an overvoltage protection chip, a controller and switching circuit. The power supply is configured to charge the battery pack. The overvoltage protection chip is electronically connected between the power supply and the battery pack, the overvoltage protection chip comprising a voltage detection pin. The controller is electronically connected to the battery pack and configured to detect whether the battery pack is a high voltage type battery pack or a normal voltage type battery, and outputting corresponding control signals according to the detection. The switching circuit comprises a switch and two voltage dividing circuits, the switch connecting a corresponding voltage dividing circuit to the positive pole of the battery pack and the voltage detection pin under control of the control signal.
    Type: Application
    Filed: October 30, 2012
    Publication date: July 4, 2013
    Inventor: YING-ZHENG LI
  • Publication number: 20130155560
    Abstract: In a semiconductor device, a surge voltage is lowered on turning OFF of a switching element, and output current is reduced on turning ON of the switching element in a non-saturated condition to achieve a reduced amount of self-heating. The semiconductor device can comprise a semiconductor switching element, an overvoltage protection circuit, and a resistance circuit to transmit a control signal for turning the switching element ON and OFF to a control terminal of the switching element. The semiconductor device can further comprise a voltage detecting switch that receives a signal corresponding to a voltage appearing at the output terminal of the switching element on turning OFF of the switching element, and a gate resistor change-over switch that operates according to a voltage of a timing capacitor connected to the output side of the voltage detecting switch to increase a resistance value of the resistance circuit.
    Type: Application
    Filed: November 12, 2012
    Publication date: June 20, 2013
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: FUJI ELECTRIC CO., LTD.
  • Patent number: 8467162
    Abstract: The ESD protection circuit is electrically connected between a first power rail and a second power rail, and includes an ESD protection device, a switching device electrically connected between the ESD protection device and a first power rail, and a low-pass filter electrically connected between the first power rail and the first switching device. The ESD protection device includes a BJT and a first resistor electrically connected between a base of the BJT and a first power rail. When no ESD event occurs, a potential of the base is larger than or equal to a potential of an emitter of the BJT. When the ESD event occurs, the potential of the base is smaller than the potential of the emitter.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: June 18, 2013
    Assignee: United Microelectronics Corp.
    Inventors: Chang-Tzu Wang, Tien-Hao Tang, Kuan-Cheng Su
  • Publication number: 20130135781
    Abstract: An electrical switching apparatus includes a first terminal, a second terminal, a neutral conductor, separable contacts electrically connected between the terminals, an operating mechanism to open and close the contacts, a fused varistor electrically connected between the first terminal and the neutral conductor; and a trip mechanism including a trip coil cooperating with the operating mechanism to trip open the contacts. A second varistor is electrically connected in series with the trip coil between the first terminal and the neutral conductor. A thyristor is electrically connected in parallel with the second varistor. An overvoltage detection circuit is electrically interconnected with and causes the thyristor to energize the trip coil and cause the trip mechanism to trip open the contacts responsive to overvoltage between the first terminal and the neutral conductor.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Inventors: THOMAS E. NATILI, David W. Stiffler, Joshua P. Mattocks
  • Publication number: 20130038973
    Abstract: An over voltage protection circuit is disclosed. The over voltage protection circuit comprises an input end, coupled to an input power, for receiving an input voltage provided by the input power; and a driving module, coupled between the input end and a ground end, for generating a discharging current when the input voltage is larger than a predefined voltage, to reduce the input voltage to the predefined voltage.
    Type: Application
    Filed: December 14, 2011
    Publication date: February 14, 2013
    Inventors: Ming-Jung Tsai, Kun-Min Chen
  • Patent number: 8319499
    Abstract: The invention relates to a motor vehicle battery sensor element comprising a resistor element 2 and at least two spatially separated electric contacts 16 positioned on the resistor element 2. To increase the measuring accuracy and to reduce the temperature variance, it is proposed that the resistor element 2 along with the electric contacts 16 is coated with a metal coating 8.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: November 27, 2012
    Assignee: Auto Kabel Managementgesellschaft mbH
    Inventors: Frank Gronwald, Franz-Josef Lietz
  • Patent number: 8315021
    Abstract: A motor detecting and protecting apparatus electrically connected with a motor. The motor detecting and protecting apparatus includes a detecting unit, an error determining unit, a controlling unit and a driving unit. The detecting unit detects a state of the motor and outputs at least one first detecting signal and at least one second detecting signal to the error determining unit. The error determining unit has a first predetermined value, wherein the error determining unit outputs a warning signal to the controlling unit while a variation value between the first detecting signal and the second detecting signal exceeds the first predetermined value. And the controlling unit will control the motor to stop operating by the driving unit in accordance with the warning signal. And a motor detecting and protecting method is also disclosed.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: November 20, 2012
    Assignee: Delta Electronics, Inc.
    Inventors: Chia-Pin Wei, Po-Tsun Kuo
  • Publication number: 20120281326
    Abstract: This document discusses, among other things, systems and methods for detecting a charging current from a startup circuit to a controller without power loss from a voltage divider, and for providing information representative of the charging current to the controller.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 8, 2012
    Inventor: Bc. Jan Grulich
  • Patent number: 8248739
    Abstract: An electrical switching apparatus is for another apparatus including a number of insulators, a number of temperature sensors operatively associated with the number of insulators, and a number of conductors operatively associated with the number of insulators. The electrical switching apparatus includes a number of separable contacts, an operating mechanism structured to open and close the separable contacts, a number of sensors structured to sense a number of currents flowing through the separable contacts and through the conductors, a processor structured to input the sensed currents from the sensors, and an output. The processor calculates at least one of: (a) a thermal age of the other apparatus from a number of sensed temperatures from the temperature sensors, and (b) the thermal age of the other apparatus from the sensed currents. The output includes the thermal age of the other apparatus.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: August 21, 2012
    Assignee: Eaton Corporation
    Inventor: Lawrence B. Farr
  • Publication number: 20120176715
    Abstract: A resistance determining system for an over voltage protection (OVP) circuit, includes an external power source, a microcontroller, a digital rheostat and a display unit. The external power source supplies an external voltage to the OVP circuit. The microcontroller stores an over voltage value. The microcontroller is connected to the external power source and configured to detect the external voltage and compare the external voltage with the over voltage value. The digital rheostat is connected to the microcontroller and includes a first rheostat having two connection terminals respectively connected to two first connection ends of the OVP circuit. The microcontroller adjusts the first rheostat to be a first resistance value to activate the OVP circuit when the external voltage is substantially equal to the over voltage value. The display unit is connected to the microcontroller and configured to display the first resistance value.
    Type: Application
    Filed: June 30, 2011
    Publication date: July 12, 2012
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: SONG-LIN TONG, PENG CHEN, QI-YAN LUO
  • Patent number: 8194369
    Abstract: A semiconductor integrated circuit includes: an output pad from which an output signal is outputted; an output signal line connected with the output pad; a first pad configured to function as a ground terminal or a power supply terminal; a first wiring connected with the first pad; an output driver connected with the output pad and configured to generate the output signal; an ESD protection device connected with the output signal line and having a function to discharge surge applied to the output pad; and a first trigger MOS transistor used as a trigger device. The output driver includes: a first protection target device connected between the output signal line and the first interconnection; and a first resistance element connected between the first protection target device and the first interconnection.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: June 5, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Mototsugu Okushima
  • Publication number: 20120092800
    Abstract: A circuit adapted for detecting over-voltage and over-current includes a first voltage-dividing resistor having one terminal connected with a DC power circuit and the other terminal connected to ground through a second voltage-dividing resistor, a current-detecting resistor having one terminal connected with the DC power circuit and the other terminal designated as an output node, a voltage regulator having one terminal connected to the output node and the other terminal is connected to ground, and a comparator which has a non-inverting input connected at the joint of the voltage regulator and the output node, an inverting input connected at the joint of the voltage-dividing resistors, and an output connected with the DC power circuit for transmitting a control signal to control work states of the DC power circuit according to a voltage comparison result of the non-inverting input with the inverting input.
    Type: Application
    Filed: October 13, 2010
    Publication date: April 19, 2012
    Inventor: Ti-Hua Ko
  • Publication number: 20120075760
    Abstract: A device for protecting electronic equipment having an output terminal includes an electronic breaker switch linked between the output terminal and ground, and a protection means which protects the electronic breaker switch against overvoltages applied to the output terminal. The protection means includes a means for detecting a current above a given threshold flowing in the electronic breaker switch, a means for prohibiting the closing of the electronic breaker switch when the current flowing in the electronic breaker switch is above the given threshold, and a means for permitting the closing of the electronic breaker switch after a given duration following a prohibition.
    Type: Application
    Filed: April 1, 2011
    Publication date: March 29, 2012
    Applicant: THALES
    Inventor: François ROBERT
  • Patent number: 8139329
    Abstract: An over-voltage protection circuit for use in low power integrated circuits is provided. The over-voltage protection circuit distributes certain connection and conditioning circuitry to a component network external to the integrated circuit. As a result, the integrated circuit need not be created with specialized high voltage components, significantly reducing its cost and complexity, and allowing it to be used in a wider range of end-user applications.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: March 20, 2012
    Assignee: Linear Technology Corporation
    Inventor: Steven Martin