Patents by Inventor Steven G. Shevach
Steven G. Shevach 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: 11853088Abstract: Embodiments for linking separate eFuse and ORING controllers for output overvoltage protection in power conversion applications. Voltage regulators are configured in parallel. An input circuit includes an input controller, the input circuit being coupled to an input of at least one voltage regulator of the voltage regulators. An output circuit includes an output controller, the output circuit being coupled to an output of the at least one voltage regulator. The output controller is coupled to the input circuit to cause the input circuit to prevent power to the at least one voltage regulator in response to the output controller detecting an overvoltage condition.Type: GrantFiled: September 8, 2021Date of Patent: December 26, 2023Assignee: International Business Machines CorporationInventors: Luke L. Jenkins, Mark L. Demarie, Steven G. Shevach, Peter A. Wendling
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Patent number: 11715195Abstract: Circuit board inspection by receiving a near infrared (NIR) image of at least a portion of a circuit board, analyzing the NIR image using a machine learning model, and detecting anomalous circuit board portions according to the analysis.Type: GrantFiled: March 22, 2021Date of Patent: August 1, 2023Assignee: International Business Machines CorporationInventors: Franco Stellari, Peilin Song, Cyril Cabral, Jr., Steven G. Shevach
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Publication number: 20230076383Abstract: Embodiments for linking separate eFuse and ORING controllers for output overvoltage protection in power conversion applications. Voltage regulators are configured in parallel. An input circuit includes an input controller, the input circuit being coupled to an input of at least one voltage regulator of the voltage regulators. An output circuit includes an output controller, the output circuit being coupled to an output of the at least one voltage regulator. The output controller is coupled to the input circuit to cause the input circuit to prevent power to the at least one voltage regulator in response to the output controller detecting an overvoltage condition.Type: ApplicationFiled: September 8, 2021Publication date: March 9, 2023Inventors: Luke L. Jenkins, Mark L. Demarie, Steven G. Shevach, Peter A. Wendling
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Publication number: 20220301134Abstract: Circuit board inspection by receiving a near infrared (NIR) image of at least a portion of a circuit board, analyzing the NIR image using a machine learning model, and detecting anomalous circuit board portions according to the analysis.Type: ApplicationFiled: March 22, 2021Publication date: September 22, 2022Inventors: Franco Stellari, Peilin Song, Cyril Cabral, Jr., Steven G. Shevach
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Patent number: 9639105Abstract: One aspect is a method that includes applying a plurality of incrementally varying voltage targets to a plurality of power phase converters operating in parallel between a source voltage rail and a load voltage rail. A phase temperature of each of the power phase converters is monitored. The phase temperature of each of the power phase converters is compared to a thermal adjustment limit. One or more of the power phase converters are adjusted to reduce an associated output current based on determining that at least one of the power phase converters exceeds the thermal adjustment limit. Power phase converter adjustments can be performed in a balanced manner such that a net sum voltage at the load voltage rail is substantially unchanged after the adjustments.Type: GrantFiled: November 18, 2014Date of Patent: May 2, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Gary F. Goth, Robert P. Makowicki, Steven G. Shevach, Allan C. VanDeventer, Xiaojin Wei
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Patent number: 9606562Abstract: One aspect is a method that includes applying a plurality of incrementally varying voltage targets to a plurality of power phase converters operating in parallel between a source voltage rail and a load voltage rail. A phase temperature of each of the power phase converters is monitored. The phase temperature of each of the power phase converters is compared to a thermal adjustment limit. One or more of the power phase converters are adjusted to reduce an associated output current based on determining that at least one of the power phase converters exceeds the thermal adjustment limit. Power phase converter adjustments can be performed in a balanced manner such that a net sum voltage at the load voltage rail is substantially unchanged after the adjustments.Type: GrantFiled: August 21, 2015Date of Patent: March 28, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Gary F. Goth, Robert P. Makowicki, Steven G. Shevach, Allan C. VanDeventer, Xiaojin Wei
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Publication number: 20160141950Abstract: One aspect is a method that includes applying a plurality of incrementally varying voltage targets to a plurality of power phase converters operating in parallel between a source voltage rail and a load voltage rail. A phase temperature of each of the power phase converters is monitored. The phase temperature of each of the power phase converters is compared to a thermal adjustment limit. One or more of the power phase converters are adjusted to reduce an associated output current based on determining that at least one of the power phase converters exceeds the thermal adjustment limit. Power phase converter adjustments can be performed in a balanced manner such that a net sum voltage at the load voltage rail is substantially unchanged after the adjustments.Type: ApplicationFiled: November 18, 2014Publication date: May 19, 2016Inventors: Gary F. Goth, Robert P. Makowicki, Steven G. Shevach, Allan C. VanDeventer, Xiaojin Wei
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Publication number: 20160139619Abstract: One aspect is a method that includes applying a plurality of incrementally varying voltage targets to a plurality of power phase converters operating in parallel between a source voltage rail and a load voltage rail. A phase temperature of each of the power phase converters is monitored. The phase temperature of each of the power phase converters is compared to a thermal adjustment limit. One or more of the power phase converters are adjusted to reduce an associated output current based on determining that at least one of the power phase converters exceeds the thermal adjustment limit. Power phase converter adjustments can be performed in a balanced manner such that a net sum voltage at the load voltage rail is substantially unchanged after the adjustments.Type: ApplicationFiled: August 21, 2015Publication date: May 19, 2016Inventors: Gary F. Goth, Robert P. Makowicki, Steven G. Shevach, Allan C. VanDeventer, Xiaojin Wei
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Patent number: 7787222Abstract: A protection circuit for a parallel power system having at least two parallel coupled voltage regulators is disclosed. The protection circuit includes at least two isolation control circuits, each control circuit being coupled to a respective voltage regulator. Each isolation control circuit includes a current sense circuit for sensing current polarity at an output of the respective voltage regulator, and a controller for automatically isolating the respective voltage regulator when an over-voltage condition exists at an output of the parallel power system and a positive current polarity is sensed at the output of the respective voltage regulator. The at least two isolation control circuits isolate only a voltage regulator having positive current outflow during the over-voltage condition. In one embodiment, each isolation control circuit further includes an over-voltage detection circuit for detecting when the over-voltage condition exists at the output of the parallel power system.Type: GrantFiled: June 27, 2007Date of Patent: August 31, 2010Assignee: International Business Machines CorporationInventors: Kevin R. Covi, Raymond J. Harrington, Robert P. Makowicki, Steven G. Shevach, Dale F. Soreson, Brain C. Tucker
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Patent number: 7473101Abstract: A connector for a voltage regulator module (VRM) that provides for a parallel coupling to a printed wiring board (PWB) without surface mounting of the VRM includes a plurality of conductive power blades mounted within slots of insulators. The VRM connector is coupled to PWB and VRM and provides for spacing between the VRM and the PWB. The VRM connector provides for high current flow and reduced circuit heating.Type: GrantFiled: May 5, 2006Date of Patent: January 6, 2009Assignee: International Business Machines CorporationInventors: William L. Brodsky, Kevin R. Covi, Steven G. Shevach, Mitchell L. Zapotoski
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Patent number: 7298601Abstract: A protection circuit for a parallel power system having at least two parallel coupled voltage regulators is disclosed. The protection circuit includes at least two isolation control circuits, each control circuit being coupled to a respective voltage regulator. Each isolation control circuit includes a current sense circuit for sensing current polarity at an output of the respective voltage regulator, and a controller for automatically isolating the respective voltage regulator when an over-voltage condition exists at an output of the parallel power system and a positive current polarity is sensed at the output of the respective voltage regulator. The at least two isolation control circuits isolate only a voltage regulator having positive current outflow during the over-voltage condition. In one embodiment, each isolation control circuit further includes an over-voltage detection circuit for detecting when the over-voltage condition exists at the output of the parallel power system.Type: GrantFiled: August 9, 2005Date of Patent: November 20, 2007Assignee: International Business Machines CorporationInventors: Kevin R. Covi, Raymond J. Harrington, Robert P. Makowicki, Steven G. Shevach, Dale F. Sorenson, Brian C. Tucker
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Patent number: 6786639Abstract: A method and apparatus for measuring the temperature on an electronic chip. The Apparatus includes a thermal sense element on the chip, a power supply passing electrical current through said thermal sense element at a known voltage and temperature, and a measuring circuit determining the initial resistance of the thermal sense element at said known voltage and temperature. The measuring circuit measures the change of the resistance of the thermal sense element as the temperature of the electronic chip changes, and compares the change in resistance of the thermal sense element to the initial resistance. The measuring circuit determines the temperature of the electronic chip from the initial resistance and change in resistance of the thermal sense element during the operation of the electronic chip.Type: GrantFiled: August 30, 2002Date of Patent: September 7, 2004Assignee: International Business Machines CorporationInventors: Kevin Covi, Raymond Longhi, Edward J. Seminaro, Steven G. Shevach
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Publication number: 20040042529Abstract: A method and apparatus for measuring the temperature on an electronic chip. The Apparatus includes a thermal sense element on the chip, a power supply passing electrical current through said thermal sense element at a known voltage and temperature, and a measuring circuit determining the initial resistance of the thermal sense element at said known voltage and temperature. The measuring circuit measures the change of the resistance of the thermal sense element as the temperature of the electronic chip changes, and compares the change in resistance of the thermal sense element to the initial resistance. The measuring circuit determines the temperature of the electronic chip from the initial resistance and change in resistance of the thermal sense element during the operation of the electronic chip.Type: ApplicationFiled: August 30, 2002Publication date: March 4, 2004Applicant: International Business Machines CorporationInventors: Kevin Covi, Raymond Longhi, Edward J. Seminaro, Steven G. Shevach
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Patent number: 5539606Abstract: An electronic circuit breaker includes multiloop control loops based upon a current sensing loop and a voltage sensing loop. The current sensing loop also operates to drive a timer which ultimately controls whether current flows through the load or not. Additionally, the current loop is made to be dominant over the voltage loop. However, during normal operation the voltage loop and current loop act cooperatively to effectively control the impedance as seen by the load.Type: GrantFiled: February 25, 1994Date of Patent: July 23, 1996Assignee: International Business Machines CorporationInventors: Kevin R. Covi, William J. Petrowsky, Steven G. Shevach