Patents by Inventor Ching-Hsiang Su

Ching-Hsiang Su 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).

  • High-speed power-efficient coded M-ary FSK modulator
    Patent number: 6452461
    Abstract: A high-speed power-efficient coded M-ary Frequency-Shift Keying (M-ary FSK) modulator. The modulator includes a coding logic, which generates (M/2) Gray code signals in accordance with an (N−1) bits control signal; and (M/2) switching oscillators. Each switching oscillator includes: a composite crystal resonator with a first end and a second end; a first switch, which is controlled by Gray code signals, with one end connected to the first end of the composite crystal resonator, and the other end grounded via an equivalent negative resistance circuit; a second switch, which is controlled by serial data, with one end connected to the second end of the composite crystal resonator, and the other end grounded; and a capacitor, with one end connected to the second end of the composite crystal resonator, and the other end grounded.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: September 17, 2002
    Assignee: Tricome Microwave Electronics Corp.
    Inventors: Ching-Hsiang Su, Ching-Kuang Tzuang
  • High-speed power-efficient coded M-ary FSK modulator
    Publication number: 20020039053
    Abstract: A high-speed power-efficient coded M-ary Frequency-Shift Keying (M-ary FSK) modulator. The modulator includes a coding logic, which generates (M/2) Gray code signals in accordance with an (N−1) bits control signal; and (M/2) switching oscillators. Each switching oscillator includes: a composite crystal resonator with a first end and a second end; a first switch, which is controlled by Gray code signals, with one end connected to the first end of the composite crystal resonator, and the other end grounded via an equivalent negative resistance circuit; a second switch, which is controlled by serial data, with one end connected to the second end of the composite crystal resonator, and the other end grounded; and a capacitor, with one end connected to the second end of the composite crystal resonator, and the other end grounded.
    Type: Application
    Filed: July 11, 2001
    Publication date: April 4, 2002
    Inventors: Ching-Hsiang Su, Ching-Kuang Tzuang