Audio Mixers
FET audio mixer
FETs are originally designed for high frequency applications but they can be used for audio frequencies and in fact they perform excellently in this area. This FET audio mixer is an example of FET’s versatility.
This mixer needs only four FETs and performs very well (actually you cannot expect a high quality mixer).
The mixer’s input impedance [...]
One transistor audio mixer
The simpliest audio mixer schematic on the net. It has only one transistor and can support as many audio signal as you can afford. BC109C is a very cheap transistor and with a few resistor and capacitors you can build quickly a simple audio mixer that you can use in your pirate radio or wherever [...]
4 channels mixer voltage controlled
The audio mixer schematic we propose is developed arround 4 amplifiers build inside SSM2024 produced by Precision Monolithics Inc. (PMI) and is voltage controlled (VR).
The maximum VR voltage is 5.5V. The signal/noise ratio is 90dB and 130Khz band wide. This 4 channels mixer works great at +- 15V but you can use voltages between 9V [...]
