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. 03, 2009
Filed:
May. 15, 2008
Applicant:
Yukihiko Tanizawa, Kariya, JP;
Inventor:
Yukihiko Tanizawa, Kariya, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
An A/D converter circuit uses first and second ring delay lines. The first and second ring delay lines are supplied with input signals, which increase/decrease oppositely from each other with respect to change directions. In each ring delay line, a first counter counts the number of times of circulation of a pulse signal circulating therein to find a digital data, and a last digital data is subtracted from a present digital data. By adding the resulting first and second digital data of the first and second ring delay lines, a digital data of the input voltage of linear characteristics is provided.