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:
Feb. 22, 2005
Filed:
Sep. 26, 2001
Kevin Dotzler, San Diego, CA (US);
Kevin Dotzler, San Diego, CA (US);
Denso Corporation, Kariya, JP;
Abstract
A battery charger for charging a battery from a power source is provided. The battery charger includes a current sense circuit in series with the power source and the battery. A linear preregulator includes a first controlled switch coupled to the power source to generate a regulated output. The first controlled switch is responsive to a preregulator control signal, varying the first controlled switch impedance so that the regulated output is generated. A control circuit is powered by the preregulator regulated output. The control circuit generates the preregulator control signal and a charger control signal. A second controlled switch is coupled between the regulated output and the battery. The impedance of the second controlled switch is varied in response to the charger control signal so that a regulated flow of charge is supplied to the battery.