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:
May. 09, 2017
Filed:
Apr. 09, 2015
Applicant:
Tetsuroh Tatebe, Osaka, JP;
Inventor:
Tetsuroh Tatebe, Osaka, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/16 (2016.01);
U.S. Cl.
CPC ...
H02P 6/16 (2013.01);
Abstract
A signal amplifier for a phase detector, based on plural sensor signals having amplitude levels in accordance with a rotational position of a rotor of a motor to detect the rotational position thereof includes a first phase detector; a phase counter; a signal amplification factor operation circuit; a signal amplification factor controller; and a signal amplification unit.