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:
Oct. 06, 2015
Filed:
Mar. 18, 2014
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Katsumi Inoue, Shiojiri, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/08 (2006.01); H02M 7/5387 (2007.01); H03K 17/06 (2006.01); H03K 17/16 (2006.01); H02P 7/285 (2006.01); H02M 3/155 (2006.01);
U.S. Cl.
CPC ...
H02P 6/085 (2013.01); H02M 7/5387 (2013.01); H02P 7/285 (2013.01); H03K 17/06 (2013.01); H03K 17/165 (2013.01); H02M 2003/1555 (2013.01); H03K 2217/0045 (2013.01);
Abstract
When a counter-electromotive force generated by an inductive load is applied to the drain of a switch element, the gate of the switching element may pull the gate potential toward the direction opposite to its original potential due to capacitance coupling of the drain-gate capacitance, and this may cause a malfunction. To cope with this, a switch element that pulls the potential to the reverse direction is provided and controlled to turn on at timing at which the counter-electromotive force is applied.