Patents by Inventor Yusuki Yamada

Yusuki Yamada 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).

  • Signal processing device
    Patent number: 5406636
    Abstract: An audio electronic volume controller (100; consisting of a ladder resistance and a CMOS switch group) and an output buffer (B2) are formed within an identical semiconductor substrate 10S, and nodes (N.sub.31 and N.sub.31) are directly connected by a wiring layer (31). An input differential circuit element of an operational amplifying element which is a main unit of the output buffer (B2) is configured using MOSFETs. Accordingly, input bias current and floating impedance can be decreased which leads to a decrease in the generation of click noise.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: April 11, 1995
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Engineering Company Limited
    Inventors: Yusuki Yamada, Hidemitsu Nakano