Patents by Inventor Richard Liggiero, III

Richard Liggiero, III 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: 7957924
    Abstract: A method, circuit, and computer program product for receiving a first intermediate signal that is at least partially based upon a first reference signal. A second intermediate signal is received that is a time-shifted version of the first intermediate signal. An output signal is generated that is based upon the difference between the first intermediate signal and the second intermediate signal. An anticipated differential change in the output signal is determined, the anticipated differential change to occur based upon a transition in the first reference signal. A realized differential change in the output signal is measured, the realized differential change occurring based upon a transition in the first reference signal. The realized differential change in the output signal is compared to the anticipated differential change in the output signal to determine a nonlinearity indicator.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: June 7, 2011
    Assignee: LTX-Credence Corporation
    Inventors: Richard Liggiero, III, Alan J. Reiss
  • Patent number: 7664621
    Abstract: The present disclosure relates to a system and method for mapping system transfer functions. Accordingly, some operations may include receiving a first intermediate signal that is at least partially based upon a first reference signal. A second intermediate signal is received that is at least partially based upon a second reference signal. An output signal is generated that is based upon the difference between the first intermediate signal and the second intermediate signal. A first anticipated differential change in the output signal is determined, the first anticipated differential change to occur based upon a transition in the first reference signal. A second anticipated differential change in the output signal is determined, the second anticipated differential change to occur based upon a transition in the second reference signal. Numerous other operations are also within the scope of the present disclosure.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: February 16, 2010
    Assignee: LTX Corporation
    Inventors: Richard Liggiero, III, Alan J. Reiss, Philip E. Perkins
  • Publication number: 20090039920
    Abstract: A method, circuit, and computer program product for receiving a first intermediate signal that is at least partially based upon a first reference signal. A second intermediate signal is received that is at least partially based upon a second reference signal. An output signal is generated that is based upon the difference between the first intermediate signal and the second intermediate signal. A first anticipated differential change in the output signal is determined, the first anticipated differential change to occur based upon a transition in the first reference signal. A second anticipated differential change in the output signal is determined, the second anticipated differential change to occur based upon a transition in the second reference signal. A first realized differential change in the output signal is measured, the first realized differential change occurring based upon a transition in the first reference signal.
    Type: Application
    Filed: May 9, 2008
    Publication date: February 12, 2009
    Inventors: Richard Liggiero, III, Alan J. Reiss, Philip E. Perkins
  • Publication number: 20090043522
    Abstract: A method, circuit, and computer program product for receiving a first intermediate signal that is at least partially based upon a first reference signal. A second intermediate signal is received that is a time-shifted version of the first intermediate signal. An output signal is generated that is based upon the difference between the first intermediate signal and the second intermediate signal. An anticipated differential change in the output signal is determined, the anticipated differential change to occur based upon a transition in the first reference signal. A realized differential change in the output signal is measured, the realized differential change occurring based upon a transition in the first reference signal. The realized differential change in the output signal is compared to the anticipated differential change in the output signal to determine a nonlinearity indicator.
    Type: Application
    Filed: May 9, 2008
    Publication date: February 12, 2009
    Inventors: RICHARD LIGGIERO, III, Alan J. Reiss