Patents by Inventor Mutsuo Sakai

Mutsuo Sakai 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).

  • Patent number: 4686706
    Abstract: A digital signal receiver comprises a plurality of frequency characteristic correcting circuits (14, 15, 16) for correcting a group delay characteristic which is different for each of the respective broadcasting stations and a location for reception thereof. A station selecting integrated circuit (18) provides a switching signal corresponding to a selected station position to render non-conductive any of transistors (Q1, Q2, Q3) for selecting the respective frequency characteristic correcting circuits through switches (SW1 to SW8) for determining which of the plurality of frequency characteristic correcting circuits is to be selected. The corresponding frequency characteristic correcting circuit is enabled in response to non-conduction of any one of the transistors for connection to the output from an intermediate frequency circuit (2) including a detecting circuit for demodulating the digital signal.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: August 11, 1987
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Mutsuo Sakai