音频混合器电路图(MOSFET audio mixer)
下图是一采用场效管的多路音频混合器，图示为两路混合，但理论上可以按需求参考下图增加输入通道。我最多看到的是25路混合。
This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just duplicating the "sections" which are clearly visible on the schematic.
Schematic
图 2N3819引脚图
Part
Total Qty.
Description
R1, R3
2
10K Pot
R2, R4
2
100K 1/4 W Resistor
R5
1
6.8K 1/4 W Resistor
C1, C2, C3
3
0.1uF Capacitor
Q1
1
2N3819 Junction FET
MISC
1
Wire, Shielded (Metal) Case, Phono Or Other Plug For Output
Notes
1. As many or as few channels as are required can be added to the mixer. Do this by just duplicating the input "sections" which are clearly shown on the schematic. One version of this mixer I saw had 25 inputs!
2. A shielded case is probably needed to reduce hum and help stop oscillations.
3. The circuit can be powered by a single 9 volt battery.