Patents by Inventor Masayuki Matsutake

Masayuki Matsutake 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: 4850038
    Abstract: A frequency converter suitable for a multi-channel broadcast signals receiver is provided. The frequency converter includes a pre-amplifier with an AGC control terminal, first and second local oscillators, a first mixer for converting a first-RF frequency of the broadcast signal to a second-RF frequency using a first oscillation signal output from the first local oscillator, a second-RF signal amplifier with an AGC control terminal for amplifying the second-RF signal, a second mixer for converting the second-RF frequency of the second-RF signal output from the second-RF signal amplifier to a third-RF frequency using a second local oscillation signal output from the second local oscillator, and an AGC circuit for feeding back to the pre-amplifier and the second-RF signal amplifier the AGC signal which is obtained from the third-RF frequency signal as a conversion output from the second mixer for simultaneously controlling the gains of both the preamplifier and the second-RF signal amplifier.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: July 18, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Fumiaki Shibata, Masayuki Matsutake