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:
Dec. 10, 1985
Filed:
Feb. 11, 1983
Applicant:
Inventors:
Michael G Tuthill, Limerick, IE;
Paschal Minogue, Portroe, IE;
Assignee:
Analog Devices, Incorporated, Norwood, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307577 ; 307297 ; 307579 ; 3403 / ;
Abstract
A CMOS D/A converter for use in a voltage-mode and having complementary-driven switch pairs for V.sub.ref and A.sub.gnd respectively. The 'ON' gate voltage of the A.sub.gnd switch is adjusted in accordance with the value of V.sub.ref, to give switch V.sub.GS equality and therefore 'ON' resistance matching with the V.sub.ref switch over a wide range of reference voltage. Circuits are shown for developing the A.sub.gnd gate voltage varying with V.sub.ref.