17-07-2012, 04:22 PM
Automatic Gain Control (AGC)/Automatic Volume Control (AVC)
Automatic Gain Control.docx (Size: 79.31 KB / Downloads: 28)
AIM:
In the front-end electronics of a system, we may require that the gain of the amplifier is adjustable, since the amplitude of the input keeps varying. Such as system can be designed using feedback. This experiment demonstrates one such system.
THEORY:
In the signal chain of an electronic system, the output of the sensor can vary depending on the strength of the input. To adapt to wide variations in the magnitude of the input, we can design the amplifier such that its gain can be adjusted dynamically. This is possible when the input signal has a narrow bandwidth and the control system is called Automatic Gain Control or AGC. Since we may wish to maintain the output voltage of the amplifier at a constant level, we also use the term Automatic Volume Control (AVC).
Results:
1. We have designed the AUTOMATIC GAIN CONTROL and we have plotted the Transient Response.