Patents Assigned to Actran Systems, Inc.
  • Electronically tuned electro-acoustic power oscillator
    Patent number: 4977380
    Abstract: The electronically tuned power oscillator (ETPO) of the present invention provides a method and apparatus that drives a narrow-band (high Q) transducer over a relatively broad band of frequencies. A pseudo-random sequence generator dynamically switches a bank of capacitors varying the resonant frequency of the power oscillator. A node on the power oscillator provides the clock for the pseudo-random sequence generator thereby providing a synchronized frequency change on every time varying cycle.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: December 11, 1990
    Assignee: Actran Systems, Inc.
    Inventors: Robert J. Martin, Barry L. Lane