Patents by Inventor Masafumi Kanagawa

Masafumi Kanagawa 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).

  • A/D converter
    Patent number: 4833474
    Abstract: An A/D converter apparatus comprises: a sampling signal generating means to generate an oversampling signal and an internal sampling signal; a converter means to convert an input analog signal into a digital signal in synchronism with the oversampling signal; and a decimator means to perform a specified decimation on the digital signal in synchronism with the internal sampling signal; whereby the sampling signal generating means maintains the frequencies of the oversampling signal and the internal sampling signal in a specified relationship.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: May 23, 1989
    Assignees: Hitachi Ltd., Hitachi VLSI Engineering Corp.
    Inventors: Kenji Nagai, Masayuki Yamashita, Masafumi Kanagawa, Mitsumasa Sato, Tsuneo Ito