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. 25, 1997
Filed:
Dec. 02, 1993
Applicant:
Inventors:
Teruo Hieda, Yokohama, JP;
Kousuke Nobuoka, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H03M / ;
U.S. Cl.
CPC ...
358445 ; 358456 ; 358518 ; 341120 ; 341131 ; 348674 ;
Abstract
A low-cost A/D converting apparatus having a high precision includes a first A/D converter to which an analog input signal is applied as an input, a plurality of D/A converters to which an output from the first A/D converter is applied as an input, a subtractor for subtracting at least one output of outputs of the plurality of D/A converters from the analog input signal, and a second A/D converter, to which an output from the subtractor is applied as an input, having a resolution higher than a resolution of the first A/D converter.