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:
Sep. 10, 1996
Filed:
Dec. 23, 1993
Edward Li, Roselle, IL (US);
Ralph M Mitchell, Elgin, IL (US);
John H Aseltine, Buffalo Grove, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An improved battery charger apparatus and method with multiple range current control includes a programmable current source (101) for providing a charge current (105) to charge a battery (107). An amplitude of the charge current (105) is dependent on a charge demand signal (117) supplied to the programmable current source (101). A scaler (109) provides a scaled charge current signal (111), dependent on the charge current (105) and a current range signal (113). A charge current control unit (115) regulates the charge current (105) by providing the charge demand signal (117) to the programmable current source (101) dependent on the scaled charge current signal (111). More than one amplitude of the charge current (105) is provided to the battery (107), dependent on more than one current range signal (113) provided by the charge current control unit (115) to the scaler (109). Moreover, a constant amplitude of the scaled charge current signal (111) is maintained responsive to the more than one current range signal (113).