Agc System For Audio Signals Circuit


Posted on May 27, 2012

This circuit is an AGC system for audio-frequency signals. AGC systems usually consist of three parts: an amplifier, rectifier, and controlled impedance. In this circuit the functions of an amplifier and a rectifier are performed by a single op amp. This makes the system simple and cheap.The rectifier is made with the output push-pull cascade of the op amp and Rs, RL, and CB. The transistor Ql and D1 are used as a voltage-controlled resistance (Z).


Agc System For Audio Signals Circuit
Click here to download the full size of the above Circuit.

The input signal is (Z + R^/Z times, diminished by the voltage divider and 1 + R2/Ri times, amplified by the op amp. C2 eliminates influence of dc bias voltage. R3 protects Ql and D1 from excessive current.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

5 Digit Alarm Keypad
LED runner with 74LS163
Laser Data Link schematic
15V And 5V Car Battery Supply
Rise Nikon Camera Remote Control
delay circuit for surround sound
light sensor circuit
multi sound for guitars
10W Audio Amplifier with Bass-boost
13.8V 20A linear power supply
Display circuit
12 Volt 20 Amp Power Supply
Photoelectric high current small signal control circuit
High voltage power supply and boost for the BST capacitor DAC provides a tuning signal circuit diagram



Top