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. 04, 1994
Filed:
Nov. 25, 1992
Gene L Armstrong, II, Garland, TX (US);
Benchmarq Microelectronics, Inc., Carrollton, TX (US);
Abstract
A power resource management system includes a battery charging system (20) that is connected between a positive voltage terminal and a voltage sense terminal (15). An operating system (10), that in one mode operates off of the battery and in a second and charging mode operates off the power source (24), is connected between the positive terminal (12) and the voltage sense node (15). A sense resistor (16) is connected between the voltage sense node (15) and a ground terminal (18). The power source (24) is operable to deliver voltage across the positive terminal (12) and the negative terminal (18). The battery charger (20) includes a charge modulator (24) and a buck regulator which has a switch (26) that is controlled by the controller (34). The controller (34) receives the voltage on the node (15) and controls the switch (26) in accordance with the voltage thereon, which voltage is a function of both the current supplied to the operating system ( 10) and the current supplied to the battery (22) for a charging operation. As the operating system current increases, the charge delivered to the battery decreases and, conversely, as the current to the operating system (10) decreases, the current delivered to a battery (22) increases.