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:
Dec. 31, 1996
Filed:
Nov. 29, 1994
Nathaniel B Wilson, San Diego, CA (US);
Elbert A McLaren, II, San Diego, CA (US);
Other;
Abstract
The battery charging system of the present invention charges the battery (105) of a portable, multiple mode radiotelephone (110) while the radiotelephone is operating. The radiotelephone (110) generates a clock signal having varying on/off times dependent on the radiotelephone's mode. This mode can include an analog cellular mode or a digital cellular mode. The battery charger (100) detects the clock signal's on/off times and changes the average charge current to compensate for one mode requiring a larger charge current. The clock signal is coupled to the charger using the same multiple function connection (160) as the battery's thermistor (150). The charger (100) uses the thermistor (150) to determine when the battery (105) is charged.