M50194AP application circuit

It is a typical application circuit of M50194AP . The output signal of the microphone amplifier or the surround sound signal that requires delay
is input from the input terminal 1N, and the signals after LC delay processing are output from pins 33.35 and 36 respectively, so the subsequent
hybrid amplifier is special and relatively complex. One of the signals output by pin 33 is fed back to the input
terminal through RPi. When the circuit is in reverberation mode, pin 37 of the feedback output terminal has no output. By adjusting this potentiometer, the appropriate
reverberation effect can be obtained. The other path passes through IC3 and 35 After the signal output by the pin is mixed, it is filtered by a second-order passive filter and then input to
IC5 to be mixed with the main signal and output from the Rout terminal. Since the 36-pin signal comes directly from the demodulator DEMi~DEM3, it needs to
be processed by the external integrator ICLa first, and then mixed with the output signal of 35-pin through IG. After
being filtered by the second-order passive filter , it is then input to IC4 and The main signal is mixed and output from the Lout terminal. When the circuit works in echo mode,
the feedback signal from pin 37 of the feedback terminal is fed back to the input terminal through column 2. Adjustment) 2 can obtain appropriate multiple echo effects o) 3.
Used to adjust the reverberation level oSAi is a mixing switch. If necessary, if the output terminal is connected to a surround sound amplifier,
SAi can be disconnected to prevent the main The signal goes to the rear channels.