Patents by Inventor Zhou Changming

Zhou Changming 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).

  • Patent number: 6366765
    Abstract: The present invention intends to provide a receiver which receives a signal by switching a plurality of communication systems, wherein a circuit scale is reduced to intend to the miniaturization of a device. The receiver converts a received signal to a base band signal by a local oscillation frequency based on the selected communication system by a mixer, limits a band by an LPF through which signals of all communication systems can pass, performs a band limitation based on the communication system by weighting with a tap coefficient based on the selected communication system to synthesis by a transversal filter, and demodulates a signal by a demodulation system based on the selected communication system by a demodulating unit.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: April 2, 2002
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Naoki Hongo, Tetsuhiko Miyatani, Kenzo Urabe, Zhou Changming