Automatic gain control apparatus

Details Automatic gain control apparatus Automatic gain control apparatus

1994-06-01

1995-09-12

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330279, 4552401, H03G 320

Patent

active

054500354

ABSTRACT:
An automatic gain control apparatus includes a variable gain amplifier 5 to amplify a signal with an amplification factor and a gain controller 6 to control the amplification factor of the variable gain amplifier 5. A gain limiter 7 is provided for restricting the magnitude of the amplification factor within a predetermined range. The amplification factor therefore does not vary largely, even immediately after the input signal level is suddenly changed due to a switching of a transmitter antenna or a carrier frequency. Thus, it is possible to quickly respond to the change of input signal without requiring a large dynamic range in the circuit following the automatic gain control apparatus.

REFERENCES:
patent: 4890297 (1989-12-01), Zscheile, Jr. et al.

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