Patents by Inventor Richard Putman

Richard Putman 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).

  • Scan cells with minimized shoot-through and scan chains and integrated circuits using the same
    Patent number: 7747917
    Abstract: A scan including data and shift inputs, and input selection circuitry for selecting between the data and shift inputs during normal, capture, and shift modes in response to only a first control signal and a second control signal. The input selection circuitry includes a first storage element for storing a bit representing a state of the first control signal in response to a change in state of the second control signals and multiplexing circuitry. The multiplexing circuitry is operable in the normal mode to select the data input in response to a first state of the second control signal, in the capture mode to select the data input when the bit stored in the first storage element represents a first state of the first control signal, and in the shift mode to select the shift input when the bit stored in the first storage element represents a second state of the first control signal.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: June 29, 2010
    Assignee: Cirrus Logic, Inc.
    Inventors: Richard Putman, Michael Kost, Sanjay Pillay
  • Scan cells with minimized shoot-through and scan chains and integrated circuits using the same
    Publication number: 20080307280
    Abstract: A scan including data and shift inputs, and input selection circuitry for selecting between the data and shift inputs during normal, capture, and shift modes in response to only a first control signal and a second control signal. The input selection circuitry includes a first storage element for storing a bit representing a state of the first control signal in response to a change in state of the second control signals and multiplexing circuitry. The multiplexing circuitry is operable in the normal mode to select the data input in response to a first state of the second control signal, in the capture mode to select the data input when the bit stored in the first storage element represents a first state of the first control signal, and in the shift mode to select the shift input when the bit stored in the first storage element represents a second state of the first control signal.
    Type: Application
    Filed: May 23, 2008
    Publication date: December 11, 2008
    Inventors: Richard Putman, Michael Kost, Sanjay Pillay