Patents by Inventor Tracy R. Schwenk

Tracy R. Schwenk 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).

  • Apparatus and method for amplifying an audio signal without reference to ground
    Patent number: 6144258
    Abstract: There is provided an audio power amplifier having an output DC isolated from ground between two capacitors which are connected in series across a bias potential. The bias potential may be generated from common AC line currents by a simple bridge rectifier without the need for a bulky power supply transformer. The amplifier is DC isolated from the input signal, and hence from ground, by a balun or other small-signal transformer. Feedback is provided to compensate for ripple appearing on the bias potential.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: November 7, 2000
    Inventor: Tracy R. Schwenk