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Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable …
MAX9814 Microphone Amplifier with AGC and Low-Noise ...
https://www.maximintegrated.com/en/products/analog/audio/MAX9814.html
The MAX9814 IC contains a low-noise amplifier, an output amplifier, a microphone bias-voltage generator, and automatic gain-control (AGC) internal circuitry. The overall gain of the microphone amplifier is selectable to 40dB, 50dB, or 60dB …
AN-1451LM4935 Automatic Gain Control (AGC) Guide
https://www.ti.com/lit/an/snaa028a/snaa028a.pdf
preamplifier to maintain a pre-definedtarget level at the amplifier's output. The AGC loop is shown in Figure 1. Figure 1. AGC Loop 2 AGC Operation The AGC circuit adjusts the level of the input applied to the ADC. This optimizes the dynamic range of the voice data when the level of the source is unknown. A target level for the output is set so that any
VERSATILE AUDIO AGC CIRCUIT - EYRG.net
http://www.g8ajn.eyrg.net/mediafire/AGC2014ArticleFull.pdf
An integral voltage-controlled amplifier (VCA) provides up to 60 dB of gain in the signal path with approximately 30 kHz bandwidth. Additional gain if required is provided by an input buffer/ microphone input op amp circuit that can be set anywhere from 0dB to 20 dB, for a total signal path gain of up to 80 dB.
Circuit Design: Automatic Gain Control - Engineers Garage
https://www.engineersgarage.com/circuit-design-automatic-gain-control/
This is an amplifier with a fixed gain and it is used to pre-amplify the audio signals from the microphone to the required level for the AGC amplifier circuit. The signals produced on the microphone especially from the distant sound sources will be very feeble and needs to be amplified several times before they can be applied to any other circuits.
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. The Automatic Gain Control principle is widely use in AM receivers and sometimes AGC is called …
Automatic Gain Control (AGC) in Receivers
https://www.qsl.net/va3iul/Files/Automatic_Gain_Control.pdf
• Above the AGC knee the AGC characteristics should be not flat, and must have a slope between 6dB and 10dB. • The AGC system is basically a feedback amplifier and has a closed-loop gain characteristic, which is essentially low-pass. • AGC systems that include a reference voltage inside the control loop are referred as delayed AGC.
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