Automatic gain control method and circuit for a time division mu

Details Automatic gain control method and circuit for a time division mu Automatic gain control method and circuit for a time division mu

1986-01-21

1988-07-12

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375 98, H04J 302

Patent

active

047575026

ABSTRACT:
An AGC method and circuit for a receiver of time division multiple access signals, e.g. signals transmitted by a satellite or be microwave links. The AGC circuit includes a highspeed attenuator (24) constituted by two ring mixers (40, 41) connected in series and controlled in parallel, the AGC feedback loop (312) is sampled by a highspeed sampler (14) which is activated under the control of a control feedback loop (313) solely during the beginning of the preamble of each packet, during the period which enables the carrier to be recovered. The AGC voltage is then stored on a capacitor (16) and continues to be applied to control the attenuator (34) during the remainder of the time taken to receive the packet.

REFERENCES:
patent: 4464723 (1984-08-01), Charitier
patent: 4656630 (1987-04-01), Miyo

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