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:
Mar. 02, 2004
Filed:
Oct. 25, 2001
Applicant:
Inventor:
Takashi Konno, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/34 ; H03M 1/38 ;
U.S. Cl.
CPC ...
H03M 1/34 ; H03M 1/38 ;
Abstract
An A/D converter includes first to N stages of A/D conversion units, which are connected in series, each A/D conversion unit converting an analog input signal into a digital output signal. Each of the A/D conversion units includes a) a sample-and-hold circuit, which holds an analog input signal; b) a selector which selects one from a plurality of reference voltage signals in accordance with a digital output signal outputted from the one stage preceding A/D conversion unit; and c) a comparator which compares an output signal supplied from the sample-and-hold circuit with the reference voltage signal selected by the selector.