Patents by Inventor Stephen Edward Liles

Stephen Edward Liles 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).

  • Patent number: 8638153
    Abstract: Systems and methods for generating pulse clocks with programmable edges and pulse widths configured for varying requirements of different memory access operations. A pulse clock generation circuit includes a selective delay logic to provide a programmable rising edge delay of the pulse clock, a selective pulse width widening logic to provide a programmable pulse width of the pulse clock, and a built-in level shifter for shifting a voltage level of the pulse clock. A rising edge delay for a read operation is programmed to correspond to an expected read array access delay, and the pulse width for a write operation is programmed to be wider than the pulse width for a read operation.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: January 28, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Shaoping Ge, Chiaming Chai, Stephen Edward Liles, Lam V. Nguyen, Jeffrey Herbert Fischer
  • Publication number: 20130257498
    Abstract: Systems and methods for generating pulse clocks with programmable edges and pulse widths configured for varying requirements of different memory access operations. A pulse clock generation circuit includes a selective delay logic to provide a programmable rising edge delay of the pulse clock, a selective pulse width widening logic to provide a programmable pulse width of the pulse clock, and a built-in level shifter for shifting a voltage level of the pulse clock. A rising edge delay for a read operation is programmed to correspond to an expected read array access delay, and the pulse width for a write operation is programmed to be wider than the pulse width for a read operation.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 3, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Shaoping Ge, Chiaming Chai, Stephen Edward Liles, Lam V. Nguyen, Jeffrey Herbert Fischer
  • Patent number: 8456929
    Abstract: Dynamic voltage level shifting circuits, systems and methods are disclosed. A level shifting circuit comprises an input for accepting a first discrete voltage level to be shifted, a level shifting portion coupled to the input and to a second discrete voltage level, an enable portion having an enable input and coupled to the level shifting portion and an output. The level shifting circuit is configured to translate the data input at the first discrete voltage level into a second discrete voltage level. The enable portion is configured to selectively provide either the second discrete voltage level to the output or decouple at least a portion of the level shifting portion from the output based on the enable input.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: June 4, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Stephen Edward Liles, Chiaming Chai, Lakshmikant Mamileti
  • Publication number: 20110249518
    Abstract: Dynamic voltage level shifting circuits, systems and methods are disclosed. A level shifting circuit comprises an input for accepting a first discrete voltage level to be shifted, a level shifting portion coupled to the input and to a second discrete voltage level, an enable portion having an enable input and coupled to the level shifting portion and an output. The level shifting circuit is configured to translate the data input at the first discrete voltage level into a second discrete voltage level. The enable portion is configured to selectively provide either the second discrete voltage level to the output or decouple at least a portion of the level shifting portion from the output based on the enable input.
    Type: Application
    Filed: April 7, 2010
    Publication date: October 13, 2011
    Applicant: QUALCOMM INCORPORATED
    Inventors: Stephen Edward Liles, Chiaming Chai, Lakshmikant Mamileti
  • Patent number: 7876631
    Abstract: Circuits and methods provided in multiple voltage domains that include self-tuning or timing of a signal path are disclosed. A plurality of paths is provided in the circuit. Each path traverses a portion of the multiple voltage domains, which may include any number or combination of the multiple voltage domains. Each of the paths has a delay responsive to at least one of the plurality of voltage domains. A delay circuit is provided and configured to generate a delay output related to the delay in the plurality of paths. In this manner, the delay output of the delay circuit is self-tuned or adjusted according to the delay in the plurality of paths. This self-tuning may be particularly suited to control the delay of a first signal path relative to a second signal path wherein the delay in the paths can vary with respect to each other during operation.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: January 25, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Chiaming Chai, Stephen Edward Liles
  • Publication number: 20100148839
    Abstract: Circuits and methods provided in multiple voltage domains that include self-tuning or timing of a signal path are disclosed. A plurality of paths is provided in the circuit. Each path traverses a portion of the multiple voltage domains, which may include any number or combination of the multiple voltage domains. Each of the paths has a delay responsive to at least one of the plurality of voltage domains. A delay circuit is provided and configured to generate a delay output related to the delay in the plurality of paths. In this manner, the delay output of the delay circuit is self-tuned or adjusted according to the delay in the plurality of paths. This self-tuning may be particularly suited to control the delay of a first signal path relative to a second signal path wherein the delay in the paths can vary with respect to each other during operation.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 17, 2010
    Applicant: QUALCOMM Incorporated
    Inventors: Chiaming Chai, Stephen Edward Liles