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How to build an audio mixer - Electronic Circuits
https://www.circuitlib.com/index.php/tutorials/product/39-how-to-build-an-audio-mixer
Audio Mixer Circuit using LM3900 - circuits-diy.com
https://circuits-diy.com/audio-mixer-circuit-using-lm3900/
We need an amplifier stage to build an Audio mixer circuit, and the LM3900 IC is used as the amplifier stage here. Each audio input is controlled with Variable Resistors (VR1 through VR4) to control individual audio channels easily. All internal amplifiers are used to amplify audio input signals. Inverting the Amplifier input is provided by audio signals and non …
Build an Audio Mixer - Projects - All About Circuits
https://www.allaboutcircuits.com/projects/build-an-audio-mixer/
The full output of the mixer circuit is Vout = -Rf(V1/R1 + V2/R2 + V3/R3 . . . + Vn/Rn). Thus, by making RF larger the gain can be increased. The other option is to make the resistor in the channel(s) smaller, but you are already using a potentiometer that can become very small, thus increasing the size of Rf is a better choice.
Simple Audio Circuits - Making Easy Circuits
https://makingcircuits.com/blog/audio-amplifier-circuits-using-fet/
The amplifier uses two 2N3823 FETs (Q1, Q2) and delivers an overall open-circuit gain of 400: The maximum i-f input is 2.5 mV rms before peak clipping takes place in the 1-V rms output. The selectivity of the circuit follows very nearly to that of the filter alone. For example, -3 dB at 2-kHz bandwidth to -40 dB at 160-kHz bandwidth.
4 Simple Audio Mixer Circuits diagram using FET and ICs ...
https://www.eleccircuit.com/simple-audio-mixer-circuit-with-fet-2n3819/
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