Patents by Inventor Colin R. Smithers

Colin R. Smithers 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).

  • Bipolar transistor RF power amplifier
    Patent number: 4631491
    Abstract: A bipolar transistor R.F. power amplifier in which feedback is used to control simultaneously amplitude and phase distortion. The power amplifier is operated by determining a set of collector supply voltages located at the onset of gain saturation in the bipolar transistor and using feedback to adjust the collector supply voltage in response to variation in input drive level to operate the bipolar transistor in a mode where gain, phase shift and input impedance are simultaneously linearized, found at the onset of gain saturation.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: December 23, 1986
    Assignee: U.S. Philips Corporation
    Inventor: Colin R. Smithers