Patents by Inventor Wei Liat Chan

Wei Liat Chan 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).

  • Methods, systems, and apparatus for phase-shifted signal generation
    Patent number: 10158508
    Abstract: Methods, systems, and apparatuses are described for generating a phase-shifted signal in a transmit path and a receive path of a transceiver. When transmitting, a quadrature hybrid in the transmit path generates at least one in-phase signal and at least one quadrature signal based on a modulated signal. Phase shifters generate phase-shifted versions of the modulated signal based on a combination of these signals. When receiving, antennas receive a modulated signal and provide the modulated signal to phase shifters in the receive path. Each phase shifter modifies its received modulated signal. A matching network combines each of the modified modulated signals and provides at least one combined modulated signal to a quadrature hybrid. The quadrature hybrid generates a phase-shifted version of the modulated signal based on the at least one combined signal.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: December 18, 2018
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Michael Boers, Wei Liat Chan, Tirdad Sowlati, Bevin Perumana
  • Oscillator circuit
    Patent number: 7400209
    Abstract: Present invention relates to an oscillator circuit comprising: resonator means (102) and, first and second emitter followers (116, 118) being symmetrically coupled to the resonator means and been connected to further emitter followers (120, 122) for providing capacitive loading.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: July 15, 2008
    Assignee: NXP B.V.
    Inventors: Hugo Veenstra, Edwin Van Der Heijden, Wei Liat Chan