Patents Examined by Quochien B. Voung
  • Mixer constant linear range biasing apparatus and method
    Patent number: 7177620
    Abstract: A Gilbert cell mixer for a wireless transceiver includes a first stage that performs voltage to current conversions and that includes first and second transistors that are operated in a saturation region and third and fourth transistors that are operated in a triode region. A second stage communicates with the first stage and that performs frequency conversion. A biasing circuit communicates with the first stage to maintain a substantially constant input linear range over temperature and process variations.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: February 13, 2007
    Assignee: Marvell International Ltd.
    Inventors: King Chun Tsai, Lawrence Tse