Patents by Inventor Katsuzi Mizumoto

Katsuzi Mizumoto 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).

  • Method and apparatus for eliminating ripple component from motor control loop
    Patent number: 4283665
    Abstract: In a motor control circuit, a rotational speed detection signal containing a ripple component superimposed on a d.c. component is applied to both a low pass filter/phase lagging circuit and to a phase leading circuit, the output signals of which have a phase difference of approximately 180 degrees, to effectively cancel the ripple component and thereby extract only the d.c. component. The latter is balanced against an r.p.m. reference voltage in a comparison circuit whose output is fed back to a drive winding control circuit of the motor.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: August 11, 1981
    Assignee: Pioneer Electronic Corporation
    Inventor: Katsuzi Mizumoto