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:
May. 25, 1999
Filed:
Nov. 25, 1997
Applicant:
Inventor:
Yasuhiko Sekimoto, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323282 ; 323283 ; 323284 ;
Abstract
A voltage dropping circuit is formed within an integrated circuit having at least one internal circuit, for dropping an external power supply voltage to generate a dropped voltage, and supplying the dropped voltage to the at least one internal circuit. A voltage divider divides the dropped voltage. A comparator compares the divided voltage with a reference voltage, and generates a control voltage according to a result of the comparison. A voltage generator generates the dropped voltage in response to the control voltage. A setting block sets a ratio of the divided voltage to the dropped voltage.