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. 27, 1982
Filed:
Mar. 17, 1980
Veikko R Saari, Spring Lake Heights, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A compact, complementary metal-oxide on silicon integrated circuit operational amplifier (10, 70, 76) having a differential input stage and an output transistor (50) which has its bias current supplied by a complementary current source transistor (48) also includes filter means for coupling signals from the input stage to the gate (52) of the bias transistor (48). By these means, this normally relatively constant current is increased under certain signal conditions to increase the settling speed. In one form, the filter is a capacitor (64). In another form, it is a parallel combination of a capacitor (64) and a coupling transistor (72) in parallel. The capacitor (64) passes high frequencies, and the resistor (72) passes large amplitude signals. To prevent the signal coupling to the gate (52) from affecting other bias conditions in the circuit, the coupled portion of the gate is isolated from a bias control node (42) by a barrier device (66) which passes only D.C.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile