Pulse or digital communications – Receivers – Automatic gain control
Patent
1995-06-01
1997-11-11
Tse, Young T.
Pulse or digital communications
Receivers
Automatic gain control
4552342, 342 92, H04L 2708
Patent
active
056871953
ABSTRACT:
A digital automatic gain controller for a satellite transponder, comprising an amplification circuit for amplifying a radio frequency signal detected by a detector diode by a difference between the detected radio frequency signal and a temperature compensation signal, a microprocessor for inputting an output signal from the amplification circuit and outputting the inputted signal as a telemetry signal to the earth control station, the microprocessor adjusting an output level of a radio frequency channel in response to a telecommand signal from the earth control station based on the telemetry signal, and a conversion circuit for converting an output data signal from the microprocessor into a drive current for driving a PIN diode attenuator. According to the present invention, the digital automatic gain controller is capable of performing an automatic gain control operation flexibly and reliably on the basis of a program.
REFERENCES:
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patent: 4442458 (1984-04-01), Barter
patent: 4625240 (1986-11-01), Yablonski et al.
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"Simple Technique Yields Errorless Age Systems" Aug. 1989.
"Design Automatic Gain Control Loops the Easy Way".
Hwang Yun Son
Kim Nam Tae
Mo Seung Kee
Park Kwang Rang
Electronics and Telecommunications Research Institute
Korea Telecommunication Authority
Tse Young T.
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