Accession Number : ADD001787

Title :   Circuit for Anti-jam Receiver of Wide Dynamic Range Utilizing Instantaneous Automatic Gain Control Action for Closely Packed Pulses.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Marshall,Joseph F

Report Date : 22 Apr 1975

Pagination or Media Count : 7

Abstract : The patent describes a circuit for producing instantaneous automatic gain control of the intermediate stages for an anti-jam range receiver. A plurality of intermediate frequency amplifier stages, each having a pair of pentode tubes, are coupled in sequence by transformers. A sampling secondary winding is connected in flux relation with the primary winding of each transformer and a slow-varying back-biasing circuit is coupled to the sampling secondary winding. A voltage amplitude clipping diode is coupled to the control grid of each tube in each amplifier stage and a biasing voltage is coupled to the diodes to establish a clipping voltage level on each tube grid so that the tubes are back biased automatically for slowly varying continuous wave signals and instantaneously for rapid, high amplitude jam signals.

Descriptors :   *Antijamming, *Patents, Circuits, Automatic gain control, Receivers, Intermediate frequencies

Subject Categories : Countermeasures

Distribution Statement : APPROVED FOR PUBLIC RELEASE