Patents by Inventor Syuichi Tsuda

Syuichi Tsuda 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).

  • Baseband analog circuit with improved noise characteristics
    Patent number: 6754480
    Abstract: A baseband analog circuit includes a demodulator to demodulate a received signal and to output a baseband analog signal, a low-pass filter to filter the demodulated baseband analog signal, and an impedance converter, provided between the demodulator and the low-pass filter, having lower output impedance than the output impedance of the demodulator.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: June 22, 2004
    Assignee: Alps Electric Co., Ltd.
    Inventor: Syuichi Tsuda
  • Reception circuit
    Patent number: 6351504
    Abstract: A reception signal has a performance in which a disturbance signal level exceeds a reference line in IS-95 and in which a C/N of the whole of a reception signal level is satisfactory.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: February 26, 2002
    Assignee: Alps Electric Co., Ltd.
    Inventors: Sadao Igarashi, Syuichi Tsuda