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:
May. 24, 1994
Filed:
May. 10, 1993
Applicant:
Inventors:
James T Sundby, Tracy, CA (US);
Alexei N Shkidt, Newark, CA (US);
Assignee:
Exar Corporation, San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330253 ; 330255 ; 330257 ;
Abstract
A rail-to-rail CMOS operational amplifier with a large source current and small quiescent current. The CMOS opamp includes a folded cascode input structure, a negative slew detector and an output stage that acts as a push-pull output stage during slewing and a Class A output stage during small signal operation. The opamp can drive large capacitive loads (in excess of 0.5 .mu.F), with the load capacitor providing for the opamp frequency compensation.