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:
Sep. 19, 2000
Filed:
Nov. 18, 1998
Applicant:
Inventor:
Davide Giacomini, Valdengo, IT;
Assignee:
STMicroelectronics S.r.l., Agrate Brianza, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330264 ; 330267 ;
Abstract
A class AB CMOS output stage for an operational amplifier with a rail-to-rail output swing includes a pair of complementary control transistors connected in opposing phase to each other. Connection of the complementary control transistors is made between driving nodes of a pair of complementary output transistors driven by a differential signal. The differential signal is provided by a pair of differential signal input lines connected to an input stage of the operational amplifier. Biasing of the pair of complementary control transistors is by the differential signal.