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Automatic gain control - Wikipedia
https://en.wikipedia.org/wiki/Automatic_gain_control#:~:text=Automatic%20gain%20control%20%28AGC%29%20is%20a%20closed-loop%20feedback,variation%20of%20the%20signal%20amplitude%20at%20the%20input.
Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
The circuit consists of four basic sections: Variable attenuator (R2 & Q1), fixed gain amplifier (U1) and amplitude detection (Q2) & Q1 bias control. R1 …
VERSATILE AUDIO AGC CIRCUIT - EYRG.net
http://www.g8ajn.eyrg.net/mediafire/AGC2014ArticleFull.pdf
audio and microphone signal conditioning system on a single integrated circuit. It provides amplification, RMS detection, limiting, variable compression, and downward expansion. An integral voltage-controlled amplifier (VCA) provides up to 60 dB of gain in the signal path with approximately 30 kHz bandwidth.
Circuit Design: Automatic Gain Control - Engineers Garage
https://www.engineersgarage.com/circuit-design-automatic-gain-control/
Fig. 1: Automatic Gain Control Circuit on Breadboard The Automatic Gain Control (AGC) amplifiers are another category of amplifiers which can vary its gain according to the input signal level. They provide enough amplification for the weak signals and prevent strong signals from getting over amplified.
Synthesizing an Audio AGC Circuit
https://www.arrl.org/files/file/QEX_Next_Issue/Sep-Oct_2010/Anderson%20Sept-Oct.pdf
in a total AGC system of one fixed-gain op-amp amplifier with simplified feedback cir-cuitry, as displayed in Figure 5A. This circuit worked in Spice simulation and was verified on the bench. The Final Circuit Figure 6 displays the full AGC circuit: a fixed-gain op-amp and the control circuit of Figure 5 combined. Let’s walk through it.
Automatic Gain Control - AGC Circuit - ElectroSchematics.com
https://www.electroschematics.com/automatic-gain-control-agc/
Automatic Gain Control or AGC is a circuit design which maintain the same level of amplification for sound or radio frequency. If the signal is too low the AGC circuit will increase (amplify) the level and if is to high will lower it to maintain a constant level as possible.
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