Patents by Inventor Christopher Siu

Christopher Siu 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).

  • Transmit/receive switch
    Patent number: 7702296
    Abstract: A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: April 20, 2010
    Assignee: Mediatek USA Inc.
    Inventor: Christopher Siu
  • TRANSMIT/RECEIVE SWITCH
    Publication number: 20090036065
    Abstract: A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal.
    Type: Application
    Filed: August 1, 2007
    Publication date: February 5, 2009
    Applicant: CRYSTALMEDIA TECHNOLOGY, INC.
    Inventor: Christopher Siu