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. 07, 2016
Filed:
Mar. 16, 2015
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Yasunobu Tokuda, Okaya, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/00 (2006.01); H03B 19/14 (2006.01); G05F 3/08 (2006.01); H03K 19/0175 (2006.01); H02M 3/07 (2006.01);
U.S. Cl.
CPC ...
G05F 3/08 (2013.01); H02M 3/07 (2013.01); H03K 19/017509 (2013.01); H02M 2003/075 (2013.01);
Abstract
A drive circuit includes an output circuit having an output node that outputs, to a charge pump circuit, a drive clock signal for driving the charge pump circuit. The output circuit generates the drive clock signal based on a first clock signal and a second clock signal that is a signal whose voltage level does not change in a period during which the voltage level of the first clock signal changes, and controls, based on the second clock signal, an impedance of the output node so as to be up, in a period before the voltage levels of the drive clock signal changes.