Patents by Inventor Mitsuo Funayama

Mitsuo Funayama 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: 6101312
    Abstract: An automatic image quality-controlling device, where an FM signal output from a video head is amplified in an AGC amplifier to a uniform amplitude level. A lower-sideband variable peaking amplifier peaks the lower-sideband spectrum of the FM signal at about 1.5 MHz. The lower-sideband is then extracted through a lower-sideband filter. The amplitudes of the lower sideband are converted into a d.c. voltage, which is compared with a reference voltage to output an error voltage to feed back to the lower-sideband variable peaking amplifier so that the ratio between the magnitudes of the carrier wave and the lower-sideband component of the FM signal to be demodulated are constant. As a result, previously jutting amplitudes of the lower-sideband spectrum of an FM signal are uniform to allow optimal S/N value and excellent resolution, thereby producing sharp images.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: August 8, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Mitsuo Funayama