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:
Feb. 05, 1991
Filed:
Mar. 07, 1989
Applicant:
Inventor:
Takayuki Kohdaka, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamatsu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341159 ; 341138 ;
Abstract
A parallel analog-to-digital converter having reference-voltage generating means dividing the fundamental reference voltage into exponential reference voltages according to an exponential scale, and further dividing each voltage between two consecutive exponential reference voltages into a plurality of individual reference voltages. As a result, the individual reference voltages have a nonlinear (exponential) characteristic that as the amplitude of an analog input voltage increases, the increment of the individual reference voltages becomes larger exponentially, thus greatly reducing the number of comparators.