Patents by Inventor Terence D. Tekushan

Terence D. Tekushan 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).

  • Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage
    Patent number: 6937093
    Abstract: An amplifier is described including a pair of cathode-coupled pentode vacuum tubes. A first pentode of the pair includes a control grid configured to receive an input signal. A second pentode of the pair includes a control grid configured to be coupled to an input reference signal. A cascaded voltage regulator includes a first stage configured to generate a plate reference voltage for providing voltage to a plate of each pentode. The regulator includes a second stage configured to generate a screen reference voltage based on the plate reference voltage for providing voltage to a screen grid of each pentode. The amplifier can also include a push-pull output stage having a servo circuit configured to adjust the control bias signal for one of a pair of vacuum tubes included in the stage until the plate currents in the pair of tubes are substantially equal.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: August 30, 2005
    Assignee: Bretza, Ltd.
    Inventor: Terence D. Tekushan
  • Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage
    Publication number: 20040140850
    Abstract: An amplifier is described including a pair of cathode-coupled pentode vacuum tubes. A first pentode of the pair includes a control grid configured to receive an input signal. A second pentode of the pair includes a control grid configured to be coupled to an input reference signal. A cascaded voltage regulator includes a first stage configured to generate a plate reference voltage for providing voltage to a plate of each pentode. The regulator includes a second stage configured to generate a screen reference voltage based on the plate reference voltage for providing voltage to a screen grid of each pentode. The amplifier can also include a push-pull output stage having a servo circuit configured to adjust the control bias signal for one of a pair of vacuum tubes included in the stage until the plate currents in the pair of tubes are substantially equal.
    Type: Application
    Filed: January 7, 2004
    Publication date: July 22, 2004
    Applicant: Bretza, Ltd.
    Inventor: Terence D. Tekushan