Patents by Inventor Scott C. Loftsgaarden

Scott C. Loftsgaarden 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: 6857089
    Abstract: A receiver circuit for a tester for electronic devices is provided. The receiver circuit includes a clock receiver that is adapted to receive a source synchronous clock signal from a device under test. The receiver circuit further includes a data receiver that is responsive to the clock circuit. The data receiver is adapted to receive at least one differential data signal from the device under test. The receiver circuit also includes a trigger receiver that is responsive to the clock circuit. The trigger receiver is adapted to receive a trigger signal from the device under test. Finally, the receiver circuit includes a control circuit that is coupled to the trigger receiver. The control circuit is adapted to generate a start alignment capture signal based on the received trigger signal to initiate capture of data received at the data receiver for comparison with expected values.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: February 15, 2005
    Assignee: Teradyne, Inc.
    Inventors: Scott D. Schaber, Scott C. Loftsgaarden
  • Patent number: 6772382
    Abstract: A driver circuit for use on an integrated circuit tester. In one embodiment, the driver circuit has a timing circuit and a driver. The timing circuit has two or more inputs to receive data signals at a first frequency and at least one output. The timing circuit generates a control signal having a second higher frequency and outputs signals based on the data signals and the control signal such that the output signals are independent of the effects of timing skew and timing jitter of the data signals. The driver has at least one input coupled to the at least one output of the timing circuit to receive the output signals and couple the output signals to a device under test.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: August 3, 2004
    Assignee: Teradyne, Inc.
    Inventors: Scott D. Schaber, Scott C. Loftsgaarden
  • Publication number: 20030028832
    Abstract: A driver circuit for use on an integrated circuit tester. In one embodiment, the driver circuit has a timing circuit and a driver. The timing circuit has two or more inputs to receive data signals at a first frequency and at least one output. The timing circuit generates a control signal having a second higher frequency and outputs signals based on the data signals and the control signal such that the output signals are independent of the effects of timing skew and timing jitter of the data signals. The driver has at least one input coupled to the at least one output of the timing circuit to receive the output signals and couple the output signals to a device under test.
    Type: Application
    Filed: May 2, 2001
    Publication date: February 6, 2003
    Applicant: Teradyne, Inc.
    Inventors: Scott D. Schaber, Scott C. Loftsgaarden
  • Publication number: 20020170006
    Abstract: A receiver circuit for a tester for electronic devices is provided. The receiver circuit includes a clock receiver that is adapted to receive a source synchronous clock signal from a device under test. The receiver circuit further includes a data receiver that is responsive to the clock circuit. The data receiver is adapted to receive at least one differential data signal from the device under test. The receiver circuit also includes a trigger receiver that is responsive to the clock circuit. The trigger receiver is adapted to receive a trigger signal from the device under test. Finally, the receiver circuit includes a control circuit that is coupled to the trigger receiver. The control circuit is adapted to generate a start alignment capture signal based on the received trigger signal to initiate capture of data received at the data receiver for comparison with expected values.
    Type: Application
    Filed: May 9, 2001
    Publication date: November 14, 2002
    Applicant: Teradyne, Inc.
    Inventors: Scott D. Schaber, Scott C. Loftsgaarden