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:
Jul. 26, 2011
Filed:
Feb. 02, 2010
Kunihiko Gotoh, Kawasaki, JP;
Takeshi Takayama, Kawasaki, JP;
Kunihiko Gotoh, Kawasaki, JP;
Takeshi Takayama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
There is provided an analog-digital conversion cell being an analog-digital conversion cell that performs an N-bit analog-digital conversion (where N is a natural number) and including: a comparison circuit () comparing an analog input signal VI based on a plurality of reference voltages and outputting a first digital code DA selected from Q digital codes (where Q is a natural number equal to or more than 2+1 and equal to or less than 2−1) in accordance with a size of the analog input signal VI; a first logic operation circuit () outputting a second digital code DB selected from Q digital codes, which is expressed by DB=DA×KA+DBwhere a constant KA is a decimal number satisfying a condition of 1<KA<2 and DBis a constant, based on the first digital code DA; and an analog operation circuit () outputting an analog output signal VO expressed by VO=A×(VI−DA×KA×(VR/A)) where A and VR are constants, based on the first digital code DA and the analog input signal VI.