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. 01, 1979
Filed:
Jul. 14, 1977
Applicant:
Inventor:
Robert D Scott, Jr, Costa Mesa, CA (US);
Assignee:
Research Development Systems, Inc., El Monte, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
320 23 ; 320 32 ; 320 39 ;
Abstract
A battery charging circuit employing three operational amplifiers, one to sense charging current and two to regulate constant voltage charging, one for low rate or float level and one for high rate charging. A resistance element acts as part of the current sensing circuit and also limits charge current. A Zener diode provides a voltage reference and aids in sensing deviations of actual terminal voltage from desired terminal voltage to provide feedback control to the voltage regulating operational amplifiers.