Patents by Inventor David Henry Soo
David Henry Soo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10418805Abstract: A novel system is offered for supplying power from an input node to a load coupled to an output node. The system may have multiple switches coupled between the input node and the output node. One or more limiting circuits may be configured for controlling the switches so as to limit outputs of the switches. For example, the limiting circuits may limit current through the respective switches. One or more timers may set a delay period for indicating a fault condition after the limiting is initiated.Type: GrantFiled: June 15, 2018Date of Patent: September 17, 2019Assignee: Linear Technology LLCInventors: Joshua John Simonson, David Henry Soo, Christopher Bruce Umminger
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Publication number: 20180294646Abstract: A novel system is offered for supplying power from an input node to a load coupled to an output node. The system may have multiple switches coupled between the input node and the output node. One or more limiting circuits may be configured for controlling the switches so as to limit outputs of the switches. For example, the limiting circuits may limit current through the respective switches. One or more timers may set a delay period for indicating a fault condition after the limiting is initiated.Type: ApplicationFiled: June 15, 2018Publication date: October 11, 2018Inventors: Joshua John SIMONSON, David Henry SOO, Christopher Bruce UMMINGER
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Patent number: 10003190Abstract: A novel system is offered for supplying power from an input node to a load coupled to an output node. The system may have multiple switches coupled between the input node and the output node. One or more limiting circuits may be configured for controlling the switches so as to limit outputs of the switches. For example, the limiting circuits may limit current through the respective switches. One or more timers may set a delay period for indicating a fault condition after the limiting is initiated.Type: GrantFiled: June 10, 2014Date of Patent: June 19, 2018Assignee: Linear Technology CorporationInventors: Joshua John Simonson, David Henry Soo, Christopher Bruce Umminger
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Publication number: 20150016005Abstract: A novel system is offered for supplying power from an input node to a load coupled to an output node. The system may have multiple switches coupled between the input node and the output node. One or more limiting circuits may be configured for controlling the switches so as to limit outputs of the switches. For example, the limiting circuits may limit current through the respective switches. One or more timers may set a delay period for indicating a fault condition after the limiting is initiated.Type: ApplicationFiled: June 10, 2014Publication date: January 15, 2015Inventors: Joshua John SIMONSON, David Henry SOO, Christopher Bruce UMMINGER
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Patent number: 8853885Abstract: An apparatus and method for load sharing among N current supplies, where N>1. N current supply paths are coupled to corresponding N independent power sources, respectively. A system load is coupled to the outputs of the N current supply paths to receive N current supplies. There is a common current share bus configured to connect to the N current supply paths to provide a common current share signal, used to indicate the current contribution needed from each of the N current supply paths. In this configuration, each of the N current supply paths adjusts an adjustable voltage drop between its power source and the current supply it provides to the system load in accordance with the common current share signal so that the current supplied from each current supply path is consistent with the common current share signal.Type: GrantFiled: December 22, 2009Date of Patent: October 7, 2014Assignee: Linear Technology CorporationInventors: Christopher Bruce Umminger, David Henry Soo, Mitchell Edward Lee, Pinkesh Sachdev, Zhipeng Li
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Patent number: 8619400Abstract: An overvoltage protection method and circuit includes a positive supply input node, an output node, and a negative supply node. The overvoltage protection circuit further includes a first functional circuit configured to turn ON a MOSFET and maintain it in a low resistance state. A second functional circuit is configured to detect an overvoltage and control the gate of the MOSFET to regulate a voltage at the output node. A third functional circuit is configured to provide a startup wherein the overvoltage protection circuit is not damaged and/or to regulate an operating voltage such that an overvoltage does not appear on the overvoltage protection circuit. The external components include the MOSFET, which has a gate coupled to the output of the charge pump of the overvoltage protection circuit.Type: GrantFiled: March 19, 2012Date of Patent: December 31, 2013Assignee: Linear Technology CorporationInventors: Robert Curtis Dobkin, David Henry Soo
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Publication number: 20120287540Abstract: An overvoltage protection method and circuit includes a positive supply input node, an output node, and a negative supply node. The overvoltage protection circuit further includes a first functional circuit configured to turn ON a MOSFET and maintain it in a low resistance state. A second functional circuit is configured to detect an overvoltage and control the gate of the MOSFET to regulate a voltage at the output node. A third functional circuit is configured to provide a startup wherein the overvoltage protection circuit is not damaged and/or to regulate an operating voltage such that an overvoltage does not appear on the overvoltage protection circuit. The external components include the MOSFET, which has a gate coupled to the output of the charge pump of the overvoltage protection circuit.Type: ApplicationFiled: March 19, 2012Publication date: November 15, 2012Inventors: Robert Curtis DOBKIN, David Henry SOO
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Publication number: 20100164289Abstract: An apparatus and method for load sharing among N current supplies, where N>1. N current supply paths are coupled to corresponding N independent power sources, respectively. A system load is coupled to the outputs of the N current supply paths to receive N current supplies. There is a common current share bus configured to connect to the N current supply paths to provide a common current share signal, used to indicate the current contribution needed from each of the N current supply paths. In this configuration, each of the N current supply paths adjusts an adjustable voltage drop between its power source and the current supply it provides to the system load in accordance with the common current share signal so that the current supplied from each current supply path is consistent with the common current share signal.Type: ApplicationFiled: December 22, 2009Publication date: July 1, 2010Inventors: Christopher Bruce UMMINGER, David Henry Soo, Mitchell Edward Lee, Pinkesh Sachdev, Zhipeng Li
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Patent number: 6608402Abstract: Circuits and methods for controlling load sharing by multiple power supplies are provided. In preferred embodiments, load share controllers utilize multiple voltage control loops to monitor the output voltages that are being provided by multiple power supplies connected to a load. These voltage control loops each generate a voltage control voltage that is proportional to the difference between the actual output voltage of the corresponding power supply and the desired output voltage. The voltage control loop with the highest voltage control voltage then controls a current control voltage generated in a current control loop for each power supply via a share bus. These current control loops then regulate the current provided by the corresponding power supplies so that those currents are all proportional to the voltage on the share bus.Type: GrantFiled: June 24, 2002Date of Patent: August 19, 2003Assignee: Linear Technology CorporationInventors: David Henry Soo, Robert Loren Reay
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Publication number: 20020163255Abstract: Circuits and methods for controlling load sharing by multiple power supplies are provided. In preferred embodiments, load share controllers utilize multiple voltage control loops to monitor the output voltages that are being provided by multiple power supplies connected to a load. These voltage control loops each generate a voltage control voltage that is proportional to the difference between the actual output voltage of the corresponding power supply and the desired output voltage. The voltage control loop with the highest voltage control voltage then controls a current control voltage generated in a current control loop for each power supply via a share bus. These current control loops then regulate the current provided by the corresponding power supplies so that those currents are all proportional to the voltage on the share bus.Type: ApplicationFiled: June 24, 2002Publication date: November 7, 2002Applicant: Linear Technology CorporationInventors: David Henry Soo, Robert Loren Reay
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Patent number: 6465909Abstract: Circuits and methods for controlling load sharing by multiple power supplies are provided. In preferred embodiments, load share controllers utilize multiple voltage control loops to monitor the output voltages that are being provided by multiple power supplies connected to a load. These voltage control loops each generate a voltage control voltage that is proportional to the difference between the actual output voltage of the corresponding power supply and the desired output voltage. The voltage control loop with the highest voltage control voltage then controls a current control voltage generated in a current control loop for each power supply via a share bus. These current control loops then regulate the current provided by the corresponding power supplies so that those currents are all proportional to the voltage on the share bus.Type: GrantFiled: July 31, 2000Date of Patent: October 15, 2002Assignee: Linear Technology CorporationInventors: David Henry Soo, Robert Loren Reay