Patents by Inventor Robert B. Lefferts

Robert B. Lefferts 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).

  • Publication number: 20230023073
    Abstract: An integrated circuit (IC) chip may include a first gate-all-around (GAA) device and a second GAA device. The first GAA device may include a first set of silicon dioxide structures around a first set of silicon channels, a first set of hafnium dioxide structures around the first set of silicon dioxide structures, and a first metal structure around the first set of hafnium dioxide structures. The second GAA device may include a second set of silicon dioxide structures around a second set of silicon channels, and a second metal structure around the second set of silicon dioxide structures. Each silicon dioxide structure in the first set of silicon dioxide structures may have a first thickness. Each silicon dioxide structure in the second set of silicon dioxide structures may have a second thickness, which is greater than the first thickness.
    Type: Application
    Filed: July 21, 2022
    Publication date: January 26, 2023
    Applicant: Synopsys, Inc.
    Inventors: Victor Moroz, Robert B. Lefferts, Xi-Wei Lin, Munkang Choi
  • Patent number: 11334705
    Abstract: A system and method for providing electrical circuit design using cells with metal lines are described herein. According to one embodiment, a method includes instantiating a first parameterized cell (PCELL) into a first region of a row of an electrical circuit design. The first PCELL includes field effect transistor (FET) data representing a FET structure having a horizontal dimension and first metal track data representing a first set of adjustable parallel metal line segments extending along the horizontal dimension of the FET structure. The method also includes instantiating a second PCELL into a second region of the row adjacent to the first region. The second PCELL includes second metal track data representing a second set of adjustable parallel metal line segments. The method further includes connecting the first set of adjustable parallel metal line segments to the second set of adjustable parallel metal line segments and eliminating a connectivity short.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: May 17, 2022
    Assignee: Synopsys, Inc.
    Inventors: Robert B. Lefferts, Naveen John, Luis Jose H. Alves, Amanda J. Woon-Fat, Neelakantan Gopalan, Menaka Chandramohan
  • Publication number: 20210173999
    Abstract: A system and method for providing electrical circuit design using cells with metal lines are described herein. According to one embodiment, a method includes instantiating a first parameterized cell (PCELL) into a first region of a row of an electrical circuit design. The first PCELL includes field effect transistor (FET) data representing a FET structure having a horizontal dimension and first metal track data representing a first set of adjustable parallel metal line segments extending along the horizontal dimension of the FET structure. The method also includes instantiating a second PCELL into a second region of the row adjacent to the first region. The second PCELL includes second metal track data representing a second set of adjustable parallel metal line segments. The method further includes connecting the first set of adjustable parallel metal line segments to the second set of adjustable parallel metal line segments and eliminating a connectivity short.
    Type: Application
    Filed: December 7, 2020
    Publication date: June 10, 2021
    Inventors: Robert B. LEFFERTS, Naveen JOHN, Luis Jose H. ALVES, Amanda J. WOON-FAT, Neelakantan GOPALAN, Menaka CHANDRAMOHAN
  • Patent number: 10741538
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: August 11, 2020
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Patent number: 10339249
    Abstract: Systems and techniques for facilitating layout of an integrated circuit (IC) design are described. A distinct color pattern can be assigned to a set of shapes in a layout of the IC design that correspond to a net. Next, the layout of the IC design can be displayed in a graphical user interface (GUI) of the IC design tool. Some embodiments can move a diffusion region of a multigate device with respect to the location of the device contacts so that the diffusion region is aligned with respect to a set of fin tracks, wherein each fin of each multigate device is located on a fin track.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: July 2, 2019
    Assignee: Synopsys, Inc.
    Inventor: Robert B. Lefferts
  • Publication number: 20170330872
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Application
    Filed: July 28, 2017
    Publication date: November 16, 2017
    Applicant: Synopsys, Inc.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Publication number: 20170286584
    Abstract: Systems and techniques for facilitating layout of an integrated circuit (IC) design are described. A distinct color pattern can be assigned to a set of shapes in a layout of the IC design that correspond to a net. Next, the layout of the IC design can be displayed in a graphical user interface (GUI) of the IC design tool. Some embodiments can move a diffusion region of a multigate device with respect to the location of the device contacts so that the diffusion region is aligned with respect to a set of fin tracks, wherein each fin of each multigate device is located on a fin track.
    Type: Application
    Filed: March 29, 2016
    Publication date: October 5, 2017
    Applicant: Synopsys, Inc.
    Inventor: Robert B. Lefferts
  • Patent number: 9728528
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: August 8, 2017
    Assignee: SYNOPSYS, INC.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Patent number: 9287253
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: March 15, 2016
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Publication number: 20150162320
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 11, 2015
    Applicant: SYNOPSYS, INC.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Patent number: 8976497
    Abstract: An electrostatic discharge (ESD) device implemented within a power domain to mitigate ESD events imparted from another power domain for reducing integrated circuit (IC) failures. A first power domain includes an interface where ESD events are received and an output that can impart ESD event voltages on other components. A second power domain includes an ESD device coupled to the output of the first power domain and a protected IC. In one embodiment, the ESD device includes a floating device with an input terminal coupled to the interface output. By floating the device receiving the ESD event in the second power domain, damaging ESD induced voltages are reduced. Embodiments of the ESD device can be implemented using standard cell libraries to simplify integration.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: March 10, 2015
    Assignee: Synopsys, Inc.
    Inventors: Robert B. Lefferts, Peter C. de Jong, Roland G. de Jonge
  • Patent number: 8958186
    Abstract: An electrostatic discharge (ESD) device is implemented within a power domain to mitigate imparting ESD induced voltages on other power domains for reducing integrated circuit (IC) failures. A first power domain includes an interface with a first terminal where an ESD event is received. The interface includes a second terminal coupled to a component within a second power domain. The ESD device is disposed between the first terminal and second terminal to intercept the ESD event. In one embodiment, the ESD device includes a blocking device. The blocking device operatively decouples the first terminal and second terminal in response to a trigger signal received during an ESD event. By operatively decoupling the terminals, transmission of the ESD induced voltages is substantially mitigated. Embodiments of the ESD device can be implemented using standard cell libraries to simplify integration.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: February 17, 2015
    Assignee: Synopsys, Inc.
    Inventors: Robert B. Lefferts, Peter C. de Jong, Roland G. de Jonge
  • Publication number: 20140092507
    Abstract: An electrostatic discharge (ESD) device is implemented within a power domain to mitigate imparting ESD induced voltages on other power domains for reducing integrated circuit (IC) failures. A first power domain includes an interface with a first terminal where an ESD event is received. The interface includes a second terminal coupled to a component within a second power domain. The ESD device is disposed between the first terminal and second terminal to intercept the ESD event. In one embodiment, the ESD device includes a blocking device. The blocking device operatively decouples the first terminal and second terminal in response to a trigger signal received during an ESD event. By operatively decoupling the terminals, transmission of the ESD induced voltages is substantially mitigated. Embodiments of the ESD device can be implemented using standard cell libraries to simplify integration.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Applicant: SYNOPSYS, INC.
    Inventors: Robert B. Lefferts, Peter C. de Jong, Roland G. de Jonge
  • Publication number: 20130314824
    Abstract: An electrostatic discharge (ESD) device implemented within a power domain to mitigate ESD events imparted from another power domain for reducing integrated circuit (IC) failures. A first power domain includes an interface where ESD events are received and an output that can impart ESD event voltages on other components. A second power domain includes an ESD device coupled to the output of the first power domain and a protected IC. In one embodiment, the ESD device includes a floating device with an input terminal coupled to the interface output. By floating the device receiving the ESD event in the second power domain, damaging ESD induced voltages are reduced. Embodiments of the ESD device can be implemented using standard cell libraries to simplify integration.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 28, 2013
    Applicant: Synopsys, Inc.
    Inventors: Robert B. Lefferts, Peter C. de Jong, Roland G. de Jonge
  • Publication number: 20130113547
    Abstract: In one well bias arrangement, no well bias voltage is applied to the n-well, and no well bias voltage is applied to the p-well. Because no external well bias voltage is applied, the n-well and the p-well are floating, even during operation of the devices in the n-well and the p-well. In another well bias arrangement, the lowest available voltage is not applied to the p-well, such as a ground voltage, or the voltage applied to the n+-doped source region of the n-type transistor in the p-well. This occurs even during operation of the n-type transistor in the p-well. In yet another well bias arrangement, the highest available voltage is not applied to the n-well, such as a supply voltage, or the voltage applied to the p+-doped source region of the p-type transistor in the n-well. This occurs even during operation of the p-type transistor in the n-well.
    Type: Application
    Filed: December 22, 2011
    Publication date: May 9, 2013
    Applicant: Synopsys. Inc.
    Inventors: Victor Moroz, Jamil Kawa, James D. Sproch, Robert B. Lefferts
  • Patent number: 8208591
    Abstract: Systems and techniques for adapting and/or optimizing an equalizer of a receiver are described. The equalizer's behavior can be adjusted by modifying one or more equalization parameters. At the beginning of the adaptation and/or optimization process, the system can determine robust initial values for the one or more equalization parameters. The system can then adapt and/or optimize the equalizer by iteratively adjusting the one or more equalization parameters. Specifically, in each iteration, the system can use the receiver's clock and data recovery (CDR) circuitry to determine the number of early and late data transitions associated with one or more data patterns. Next, the system can adjust the one or more equalization parameters so that, for each data pattern in the one or more data patterns, the ratio between the number of early data transitions and the number of late data transitions is substantially equal to a desired value.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: June 26, 2012
    Assignee: Synopsys, Inc.
    Inventors: James P. Flynn, Junqi Hua, Robert B. Lefferts, Richard H. Steeves, John T. Stonick, Daniel K. Weinlader, Jianping Wen, Skye Wolfer, David A. Yokoyama-Martin
  • Patent number: 8184757
    Abstract: An on-die scope is described. The on-die scope can include one or more scope slicers, phase sweeping circuitry, voltage sweeping circuitry, and eye-diagram data collection circuitry. The clock and data recovery circuitry can receive an input signal, and output a recovered clock signal and a recovered bit-stream. The phase sweeping circuitry can receive the recovered clock signal, and output the scope clock signal by adding a phase offset to the recovered clock signal. A scope slicer can receive the voltage threshold, the scope clock signal, and the input signal, and output a scope bit-stream. The eye-diagram data collection circuitry can detect one or more bit-patterns in the recovered bit-stream, and modify values of one or more scope counters based solely or partly on the scope bit-stream and the recovered bit-stream.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: May 22, 2012
    Assignee: Synopsys, Inc.
    Inventors: James P. Flynn, Junqi Hua, Robert B. Lefferts, Richard H. Steeves, John T. Stonick, Daniel K. Weinlader, Jianping Wen, Skye Wolfer, David A. Yokoyama-Martin
  • Publication number: 20110311009
    Abstract: An on-die scope is described. The on-die scope can include one or more scope slicers, phase sweeping circuitry, voltage sweeping circuitry, and eye-diagram data collection circuitry. The clock and data recovery circuitry can receive an input signal, and output a recovered clock signal and a recovered bit-stream. The phase sweeping circuitry can receive the recovered clock signal, and output the scope clock signal by adding a phase offset to the recovered clock signal. A scope slicer can receive the voltage threshold, the scope clock signal, and the input signal, and output a scope bit-stream. The eye-diagram data collection circuitry can detect one or more bit-patterns in the recovered bit-stream, and modify values of one or more scope counters based solely or partly on the scope bit-stream and the recovered bit-stream.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 22, 2011
    Applicant: SYNOPSYS, INC.
    Inventors: James P. Flynn, Junqi Hua, Robert B. Lefferts, Richard H. Steeves, John T. Stonick, Daniel K. Weinlader, Jianping Wen, Skye Wolfer, David A. Yokoyama-Martin
  • Publication number: 20110310947
    Abstract: Systems and techniques for adapting and/or optimizing an equalizer of a receiver are described. The equalizer's behavior can be adjusted by modifying one or more equalization parameters. At the beginning of the adaptation and/or optimization process, the system can determine robust initial values for the one or more equalization parameters. The system can then adapt and/or optimize the equalizer by iteratively adjusting the one or more equalization parameters. Specifically, in each iteration, the system can use the receiver's clock and data recovery (CDR) circuitry to determine the number of early and late data transitions associated with one or more data patterns. Next, the system can adjust the one or more equalization parameters so that, for each data pattern in the one or more data patterns, the ratio between the number of early data transitions and the number of late data transitions is substantially equal to a desired value.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 22, 2011
    Applicant: SYNOPSYS, INC.
    Inventors: James P. Flynn, Junqi Hua, Robert B. Lefferts, Richard H. Steeves, John T. Stonick, Daniel K. Weinlader, Jianping Wen, Skye Wolfer, David A. Yokoyama-Martin
  • Patent number: 7345992
    Abstract: The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs a variable rate back channel, incorporated within an existing communication that does not increase or adversely impact the transmission rate of data on the communication channel.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: March 18, 2008
    Assignee: Synopsys, Inc.
    Inventors: James Gorecki, John T. Stonick, Shawn Searles, William S. Check, Jr., Robert B. Lefferts