Automatic level control circuit

Details Automatic level control circuit Automatic level control circuit

1981-07-17

1983-09-27

Mullins, James B.

Amplifiers

Signal feedback

Nonlinear impedance element in loop path

330282, H03F 318

Patent

active

044069898

ABSTRACT:
An automatic level control circuit for an operational amplifier 16 for minimizing spikes or instantaneous gain of the amplifier at a low period wherein no signal is received on the input. The apparatus includes a multi-branch circuit which is connected between an output terminal 26 and a feedback terminal 34. A pair of zener diodes 50 and 52 are connected back-to-back in series with a capacitor 54 provided in one of the branches. A pair of voltage dividing resistors 44 and 46 are connected in another of the branches and a second capacitor 42 is provided in the remaining branch of controlling the high frequency oscillations of the operational amplifier.

REFERENCES:
patent: 3094675 (1963-06-01), Ule
patent: 3581224 (1971-05-01), Nercessian
Edward Nossen, "A Non-Linear Noise Filter", RCA Technical Notes, No. 266, Jun. 1959.

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