Patents by Inventor Thomas Bardsley

Thomas Bardsley 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).

  • Variable Gain Amplifier
    Publication number: 20070194848
    Abstract: A method of varying the gain of an amplifier and an amplifier array are provided. The amplifier array includes two or more amplifier stages (201, 202) connected in parallel with each amplifier stage having a gain control means. Input signal means (203, 204) are provided for each amplifier stage with the input signals of the amplifier stages being of different amplitude. Means for enabling and disabling an amplifier stage (216) are provided and means for summing the outputs of the enabled amplifier stages obtain an output signal (212).
    Type: Application
    Filed: April 13, 2007
    Publication date: August 23, 2007
    Inventors: Thomas Bardsley, Matthew Cordrey-Gale, James Mason, Philip Murfet, Gareth Nicholls
  • Variable gain amplifier
    Publication number: 20050258896
    Abstract: A method of varying the gain of an amplifier and an amplifier array are provided. The amplifier array includes two or more amplifier stages (201, 202) connected in parallel with each amplifier stage having a gain control means. Input signal means (203, 204) are provided for each amplifier stage with the input signals of the amplifier stages being of different amplitude. Means for enabling and disabling an amplifier stage (216) are provided and means for summing the outputs of the enabled amplifier stages obtain an output signal (212).
    Type: Application
    Filed: April 1, 2005
    Publication date: November 24, 2005
    Inventors: Thomas Bardsley, Matthew Cordrey-Gale, James Mason, Philip Murfet, Gareth Nicholls
  • System And Method Of Digitally Testing An Analog Driver Circuit
    Publication number: 20050246125
    Abstract: A circuit and method of testing an analog driver circuit using digital scan-based test methodologies. The circuit of the present invention comprises a control circuit for generating signals in response to a test enable signal, a differential driver circuit for receiving a differential input signal, amplifying the differential input signal and transmitting a differential output signal in response to the differential input signal and the signals generated by the control circuit, a programmable termination impedance circuit for generating a differential termination impedance at the output node of the differential driver circuit in response the signals generated by the control circuit, and a differential receiver circuit for receiving the differential output from the differential driver circuit, convert the differential output signal to a single ended signal and transmitting the single ended signal, all in response to the test enable signal.
    Type: Application
    Filed: March 25, 2004
    Publication date: November 3, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Joseph Marsh, Jeremy Stephens, Charlie Hwang, James Mason, Huihao Xu, Matthew Baecher, Thomas Bardsley, Mark Taylor