6通道混合器电路设计
本文介绍了一款包含3个线路输入和3个麦克风输入的6通道混合器电路。该电路适用于阻抗为200-1000欧姆的动圈麦克风，并可使用ECM或电容麦克风。麦克风输入被放大大约100倍或40dB，总增益为46dB。线路输入水平约为200mV RMS。
本文介绍了一款包含3个线路输入和3个麦克风输入的6通道混合器电路。该电路适用于阻抗为200-1000欧姆的动圈麦克风，并可使用ECM或电容麦克风。麦克风输入被放大大约100倍或40dB，总增益为46dB。线路输入水平约为200mV RMS。
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. As with any mixer circuit, a slight loss is always introduced. The final summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should be around 200mV RMS. The mic inputs are amplified about 100 times or by 40dB, the total gain with the mixer is 46dB. The mic input is designed for microphones with outputs of about 2mV RMS at 1 meter. Most microphones meet this standard.
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