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:
Mar. 16, 1993
Toshihiko Kawano, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A power source apparatus comprises a DC power source, a switching element, and a controller for performing an ON/OFF operation of said switching element at a predetermined switching frequency. The power source apparatus chops an output from the DC power source to control a DC output to be supplied to a load, or temporarily converts the output from the DC power source into an AC voltage to transform the DC voltage and supplies the transformed voltage to said load. The controller includes an external clock input terminal and a sync circuit for causing the switching frequency to coincide with a frequency of a clock applied to said external clock input terminal or a frequency which is an integer multiple of the frequency of the clock.