Patents by Inventor Allan Parks

Allan Parks 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: 11119155
    Abstract: Disclosed herein are voltage driver circuits and methods of operating the same. In some embodiments, a plurality of circuit slices are provided in a voltage driver circuit, each circuit slice has a time constant, and is controlled to switchably connect a driver output to either a high voltage level or a low voltage level, or to disconnect the driver output from both voltage levels. The circuit slices may provide an adjustable output impedance, which may be set to match the impedance of different loads. The circuit slices may also provide adjustable voltages with low power consumption, particularly in high speed applications. The circuit slices may also have programmable capacitors that may be adjusted to provide a programmable time domain behavior of the output voltage waveform, such as a programmable voltage peaking characteristic.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: September 14, 2021
    Assignee: Teradyne, Inc.
    Inventors: Jan Paul Anthonie van der Wagt, Allan Parks, Lawrence Choi
  • Publication number: 20200341059
    Abstract: Disclosed herein are voltage driver circuits and methods of operating the same. In some embodiments, a plurality of circuit slices are provided in a voltage driver circuit, each circuit slice has a time constant, and is controlled to switchably connect a driver output to either a high voltage level or a low voltage level, or to disconnect the driver output from both voltage levels. The circuit slices may provide an adjustable output impedance, which may be set to match the impedance of different loads. The circuit slices may also provide adjustable voltages with low power consumption, particularly in high speed applications. The circuit slices may also have programmable capacitors that may be adjusted to provide a programmable time domain behavior of the output voltage waveform, such as a programmable voltage peaking characteristic.
    Type: Application
    Filed: April 25, 2019
    Publication date: October 29, 2020
    Applicant: Teradyne, Inc.
    Inventors: Jan Paul Anthonie van der Wagt, Allan Parks, Lawrence Choi