Patents by Inventor Shoufang Chen

Shoufang Chen 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).

  • Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators
    Publication number: 20050266806
    Abstract: Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 1, 2005
    Inventors: Zaw Min Soe, Tony Yang, Jackie Cheng, Sining Zhou, Kuangyu Li, Fei-Ran Yang, Shoufang Chen, Tom Baker