M65839 application circuit

It is the application circuit of M65839SP . The gain and bandwidth of microphone 1 and microphone 2 are adjusted by the
external resistor-capacitance components connected to pins 3 and 4 and pins s and 9 . The gain of this circuit is set to 67dB, the low-end turning frequency Si=210 and the high-end turning
frequency fch=5.5Ⅺ7. R1 and R2 can reduce the noise when the microphone is plugged in and out. C2 and C7 are ALC time constant setting capacitors
. RPl, RP' and RP3 are the volume and reverberation volume adjustment potentiometers of microphone 1 and microphone 2 respectively . When the level of pins 34, 35 and 36 increases,
the volume increases, and vice versa. Three volume controls are also available. Clock pulse control, then pin 30 should be set to high level . The basis' is the feedback control potentiometer, if self-excitation occurs during use. A 10kfl resistor c R.Ps and RP6 can be connected to the left and right channel volume control potentiometers .