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. 16, 2020
Filed:
Jun. 04, 2019
Applicant:
New Japan Radio Co., Ltd., Chuo-ku, Tokyo, JP;
Inventors:
Kazuyuki Miyajima, Fujimino, JP;
Mitsuhiro Enomoto, Fujimino, JP;
Assignee:
NEW JAPAN RADIO CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/37 (2020.01); H02M 1/08 (2006.01); H05B 45/10 (2020.01);
U.S. Cl.
CPC ...
H05B 45/37 (2020.01); H02M 1/08 (2013.01); H05B 45/10 (2020.01);
Abstract
Provided is a constant current drive circuit that can improve accuracy of a stop timing of quick charge and prevent an overshoot, an insufficient quick charge, and the like from occurring. The constant current drive circuit includes a resistor Rconnected between the output side of the gm amplifierand the input side of the transistor M. The comparatorserving as a charge stopping circuit includes a voltage Vof, and stops charging by the quick charge circuitbased on a comparison result of the voltage Vof and the voltage Vsgenerated in the resistor R