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:
Jan. 11, 1994
Filed:
Feb. 19, 1992
Applicant:
Inventor:
Hiroshi Enomoto, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
377114 ; 377 42 ; 307265 ; 315291 ; 315D / ;
Abstract
A voltage to pulse-width conversion circuit includes a logarithmic clock generator for receiving a reference frequency signal and generating a logarithmic clock signal TCK; a counter for counting the number of clock pulses of the logarithmic clock signal TCK and outputting a digital value having a plurality of bits; a digital to analog converter for converting the digital value into an analog signal; and a voltage comparator for comparing the output signal of the digital to analog converter with a pulse width modulated control voltage and generating a pulse width modulated output signal with a predetermined duty ratio.