Patents by Inventor Shad Shepston
Shad Shepston 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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Publication number: 20240119208Abstract: A circuit analysis system performs a method for analyzing a power distribution network by determining a first S-parameter model for a first circuit element of the power distribution network. The first circuit element includes first ports that are coupled to first decoupling capacitors. Each of the first decoupling capacitors is associated with a respective first decoupling capacitor S-parameter model. The first S-parameter model is combined with one or more of the first decoupling capacitor S-parameter models to generate a combined S-parameter model for the power distribution network. Further, an impedance profile for the power distribution network is determined based on the combined S-parameter model.Type: ApplicationFiled: September 30, 2022Publication date: April 11, 2024Inventor: Shad SHEPSTON
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Patent number: 11812544Abstract: Apparatus having at least one breakout structure are provided. In one example, an apparatus includes a dielectric layer, first and second contact pads, and first and second vias. The first and second contact pads are disposed on the dielectric layer. The first via is disposed through the dielectric layer and coupled to the first contact pad. The first via is offset from the first contact pad in a first direction. The second contact pad is immediately adjacent the first via. The second via is disposed through the dielectric layer immediately adjacent the first contact pad and coupled to the second contact pad. The second via is offset from the second contact pad in a second direction that is opposite of the first direction. The first and the second contact pads define a first differential pair of contact pads that is configured to transmit a first differential pair of signals.Type: GrantFiled: December 21, 2021Date of Patent: November 7, 2023Assignee: XILINX, INC.Inventors: Shad Shepston, Robert Andrew Daniels
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Publication number: 20230199941Abstract: Apparatus having at least one breakout structure are provided. In one example, an apparatus includes a dielectric layer, first and second contact pads, and first and second vias. The first and second contact pads are disposed on the dielectric layer. The first via is disposed through the dielectric layer and coupled to the first contact pad. The first via is offset from the first contact pad in a first direction. The second contact pad is immediately adjacent the first via. The second via is disposed through the dielectric layer immediately adjacent the first contact pad and coupled to the second contact pad. The second via is offset from the second contact pad in a second direction that is opposite of the first direction. The first and the second contact pads define a first differential pair of contact pads that is configured to transmit a first differential pair of signals.Type: ApplicationFiled: December 21, 2021Publication date: June 22, 2023Inventors: Shad SHEPSTON, Robert Andrew DANIELS
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Publication number: 20070263714Abstract: For a given channel and a filter having at least one filter tap, a set of at least one weight value is determined for the at least one filter tap according to which at least one weight value substantially minimizes a gradient of a frequency response for the given channel and substantially maximizes energy of the frequency response for the given channel within a predetermined bandwidth.Type: ApplicationFiled: May 9, 2006Publication date: November 15, 2007Inventors: Karl Bois, Dacheng Zhou, Shad Shepston, David Quint
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Publication number: 20070024334Abstract: An embodiment of this invention provides a circuit and method for reducing the number of electronic components needed to calibrate circuits on an IC. A multiplexer is located on the IC where the outputs of a plurality of circuits located on the IC are each connected to a separate data input of the multiplexer. The control input of the multiplexer selects which data input of the multiplexer is connected to an external component. Each data input is individually connected to the component periodically.Type: ApplicationFiled: July 12, 2005Publication date: February 1, 2007Inventors: Shad Shepston, Yong Wang, Jason Culler
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Patent number: 7043674Abstract: Methods for testing integrated circuits (ICs) are provided. An embodiment of a method comprises: electrically interconnecting automated test equipment (ATE) with the IC; providing at least one stimulus such that the IC determines the presence of a leakage current of the first pad; and receiving information corresponding to the leakage current of the first pad. Systems also are provided.Type: GrantFiled: June 18, 2003Date of Patent: May 9, 2006Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Patent number: 6986085Abstract: Integrated circuits (ICs) are provided. A representative IC includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver tristate leakage current of the first pad. Methods, computer-readable media, systems and other ICs also are provided.Type: GrantFiled: March 8, 2002Date of Patent: January 10, 2006Assignee: Agilent Technologies, Inc.Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Publication number: 20050165855Abstract: A system and method for updating a library in a design database environment operable to be accessed by at least one design user. In one embodiment, a first engine associates an update file with appropriate design objects to generate an uncompiled update file in a trusted space environment. A second engine associated with the trusted space environment compiles the uncompiled update file into a compiled update file. A third engine transfers the compiled update file from the trusted space environment into the library in the design database environment.Type: ApplicationFiled: January 27, 2004Publication date: July 28, 2005Inventors: David Marshall, Karl Bois, Shad Shepston
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Patent number: 6762614Abstract: Integrated circuits (ICs) are provided. A representative IC includes a first pad that incorporates a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver strength of the first pad. Systems, methods, computer-readable media and other ICs also are provided.Type: GrantFiled: April 18, 2002Date of Patent: July 13, 2004Assignee: Agilent Technologies, Inc.Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Patent number: 6721920Abstract: A preferred integrated circuit (IC) includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver clock-to-q time of the first pad. Systems, methods and computer-readable media also are provided.Type: GrantFiled: June 7, 2001Date of Patent: April 13, 2004Assignee: Agilent Technologies, Inc.Inventors: Jeff Rearick, John Rohrbaugh, Shad Shepston
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Publication number: 20040044936Abstract: Methods for testing integrated circuits (ICs) are provided. An embodiment of a method comprises: electrically interconnecting automated test equipment (ATE) with the IC; providing at least one stimulus such that the IC determines the presence of a leakage current of the first pad;. and receiving information corresponding to the leakage current of the first pad. Systems also are provided.Type: ApplicationFiled: June 18, 2003Publication date: March 4, 2004Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Patent number: 6658613Abstract: A preferred integrated circuit (IC) includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the receiver setup time and/or the receiver hold time of the first pad. Systems and methods also are provided.Type: GrantFiled: March 21, 2001Date of Patent: December 2, 2003Assignee: Agilent Technologies, Inc.Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Publication number: 20030197520Abstract: Integrated circuits (ICs) are provided. A representative IC includes a first pad that incorporates a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver strength of the first pad. Systems, methods, computer-readable media and other ICs also are provided.Type: ApplicationFiled: April 18, 2002Publication date: October 23, 2003Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Publication number: 20030172332Abstract: Integrated circuits (ICs) are provided. A representative IC includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receives a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver tristate leakage current of the first pad. Methods, computer-readable media, systems and other ICs also are provided.Type: ApplicationFiled: March 8, 2002Publication date: September 11, 2003Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston
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Publication number: 20020188901Abstract: A preferred integrated circuit (IC) includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the driver clock-to-q time of the first pad. Systems, methods and computer-readable media also are provided.Type: ApplicationFiled: June 7, 2001Publication date: December 12, 2002Inventors: Jeff Rearick, John Rohrbaugh, Shad Shepston
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Publication number: 20020135391Abstract: A preferred integrated circuit (IC) includes a first pad electrically communicating with at least a portion of the IC. The first pad includes a first driver and a first receiver, with the first driver being configured to provide a first pad output signal to a component external to the IC, and the first receiver being configured to receive a first pad input signal from a component external to the IC. The first receiver also is configured to provide, to a component internal to the IC, a first receiver digital output signal in response to the first pad input signal. A first test circuit also is provided that is internal to the IC. The first test circuit is adapted to provide information corresponding to the receiver setup time and/or the receiver hold time of the first pad. Systems and methods also are provided.Type: ApplicationFiled: March 21, 2001Publication date: September 26, 2002Inventors: Jeffrey R. Rearick, John G. Rohrbaugh, Shad Shepston