Patents by Inventor Keiichi Danmoto

Keiichi Danmoto 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).

  • Clock reproducing circuit for eliminating an unnecessary spectrum
    Patent number: 5272451
    Abstract: A clock reproducing circuit for improving S/N of a PWM D/A converter is provided with a first clock reproducing portion (11) employing a crystal (11a) and a voltage controlled oscillator (11b) and with a second clock reproducing portion (12) for performing a frequency multiplication of an output signal of the first clock reproducing portion (11) to generate a proper clock signal. The second clock reproducing portion (12) consists of a phase comparator (22), loop filter, a resistance capacitance type voltage controlled oscillator (26) and a frequency divider (25).
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: December 21, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazunori Yamate, Keiichi Danmoto