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:
Nov. 11, 1997
Filed:
Apr. 13, 1995
Masahiko Sakoh, Anjo, JP;
Tatsuki Mori, Anjo, JP;
Makita Corporation, Anjo, JP;
Abstract
A battery charger includes a microcomputer operable to receive an input value corresponding to a value of charging current. A thyristor has the gate connected to an output port of the microcomputer. The microcomputer operable to adjust the firing angle of the thyristor for controlling the value of the charging current through a phase control of the charging current in response to the input value. A capacitor has a first electrode connected to the gate of the thyristor. A transistor has the collector connected to a second electrode of the capacitor, the base connected to the output port of the microcomputer, and the emitter connected to a power source voltage for the microcomputer.