Patents Represented by Attorney, Agent or Law Firm Charles W. Bathards
  • Single-to-differential buffer amplifier
    Patent number: 6441688
    Abstract: A radio frequency single to differential buffer amplifier provides a 180 degree phase difference between two output signals by using a current mirroring circuit and using different referencing on the two output signals. Fine adjustment on the phase of the two output signals can be done by adjusting a phase adjustment device embedded in a cascode amplifier. High input power handling capability is accomplished by class AB operation on two input transistors in the amplifier.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: August 27, 2002
    Assignee: Motorola, Inc.
    Inventors: Sin Kai Henry Lau, Glenn Watanabe