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.

Date of Patent:
Feb. 08, 2011

Filed:

Jan. 06, 2009
Applicants:

Masanori Furuta, Mishima, JP;

Tomohiko Ito, Yokohama, JP;

Takafumi Yamaji, Yokohama, JP;

Tetsuro Itakura, Tokyo, JP;

Inventors:

Masanori Furuta, Mishima, JP;

Tomohiko Ito, Yokohama, JP;

Takafumi Yamaji, Yokohama, JP;

Tetsuro Itakura, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/38 (2006.01);
U.S. Cl.
CPC ...
Abstract

An A/D converting apparatus includes a first A/D converter to sample an analog input signal having a D/A converter to generate a comparative signal for successive comparison with the analog input signal, a signal generator generate a differential signal between the analog input signal and the comparative signal, and a comparator to compare the comparative signal with a standard value to generate a first digital signal exhibiting high-order bit; an amplifier to amplify the differential signal to generate a residue signal; and a second A/D converter to sample the residue signal to generate a second digital signal exhibiting low-order bit.


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