The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2009
Filed:
Nov. 14, 2006
Applicant:
Shinpei Watanabe, Kanagawa, JP;
Inventor:
Shinpei Watanabe, Kanagawa, JP;
Assignee:
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 19/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A motor control circuit includes: a detector outputting a detection signal in accordance with the motor rpm; a counter counting the number of clocks in accordance with a rotational cycle represented by the detection signal; a controller counting a DC motor based on the count value; and a divider dividing a frequency of a basic clock based on a preset division value to generate a counting clock. The divider generates a counting clock having a frequency corresponding to a rotational cycle, and the counter counts the number of counting clocks.