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:
Oct. 06, 1981
Filed:
Nov. 09, 1979
Robert J McFadyen, Syracuse, NY (US);
General Electric Company, Syracuse, NY (US);
Abstract
A gated multiple stage AGC amplifier circuit comprising a differentially connected transistor pair in each stage and employing a dc feedback network for maintaining a balanced current conduction in the transistors of each transistor pair for achieving maximum gain and dynamic range throughout the gated operation. The dc feedback network includes a bias capacitor, a dc bus coupling a dc bias voltage across the capacitor to each transistor pair, and bias control means responsive to transistor current conduction for supplying charge and discharge currents that are made equal to each other for maintaining a stable dc bias voltage across said bias capacitor that results in said balanced current conduction, said bias control means exhibiting impedance characteristics that maintain said stable bias voltage throughout the gated amplifier operation. The invention has particular application to the receiver of a pulse echo system wherein the amplifier is gated 'on' to correspond with received echo pulses.