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:
Apr. 03, 1984
Filed:
Oct. 09, 1981
Yusuf A Haque, San Jose, CA (US);
American Microsystems, Inc., Santa Clara, CA (US);
Abstract
An AGC circuit (12) contains a programmable gain stage comprising an operational amplifier (150) and one or more capacitor arrays (101, 121) for controlling the closed loop gain of the operational amplifier. The output signal (V.sub.O) of this operational amplifier is rectified, and the rectified signal is alternately integrated with a reference voltage (V.sub.ref) of opposite polarity to the rectified AGC signal. The polarity of the integrated voltages operates a counter stage (200). The output bits (0.sub.2 -0.sub.N) of the counter are used to control switches (134-2 through 134-N, 135-2 through 135-N, 110-2 through 110-N, 111-2 through 111-N) in the one or more capacitor arrays which control the closed loop gain of the operational amplifier of the AGC circuit of this invention.