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:
Feb. 03, 1998
Filed:
Aug. 26, 1996
Hiroshi Mitani, Yokohama, JP;
Nobutaka Kitagawa, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A digital-to-analog converter including first and second D/A converter circuit sections of R-2R ladder resistor type and a third D/A converter circuit section of string resistor type. The first D/A converter circuit section is supplied with a binary code of upper i bits of an n-bit (i<n) digital input and a first offset voltage having the weight of the least significant bit of the binary code and effecting the D/A conversion to output a first analog voltage to a first node. The second D/A converter circuit section is supplied with the binary code of upper i bits of and a second offset voltage having the weight of the least significant bit of the binary code and effecting the D/A conversion to output a second analog voltage which is different from the first analog voltage to a second node. The third D/A converter circuit section is connected between the first and second nodes and subjects a binary code of the remaining lower j bits (j<n, j=n-i, i, j.gtoreq.1) of the digital input to the D/A conversion process to output an analog voltage corresponding to the n-bit digital input.