Automatic gain control amplifier

Details Automatic gain control amplifier Automatic gain control amplifier

1976-09-20

1977-07-19

Rolinec, Rudolph V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

325319, 325408, 330 38M, 330145, H03G 330

Patent

active

040371670

ABSTRACT:
An AM converter and AGC amplifier are described for use either separately or in combination in a radio receiver. The AGC amplifier includes a semiconductor device directly coupled to the amplifier input for receiving automatic gain control signals. The AM converter includes a single mixer transistor directly coupled to both an RF amplifier and local oscillator. The converter circuit provides attenuation of the oscillator signal by up to 60 d.b. relative to the R.F. signal, greatly reducing the necessary I.F. filtering. Both the converter and AGC circuits are fabricated on integrated circuit chips.

REFERENCES:
patent: 3447094 (1969-05-01), Beres

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