Figure 2 TBH principle sums two 8-bit PWM signals in one 16-bit DAC = Vref (MSBY+LSBY/256)/256. The asterisked resistors are ...

The remote variable resistor functions as a voltage-controlled resistor whose resistance changes based on an applied voltage.

Aiming at the problem of poor human auditory sensation caused by the wide range variation of audio signal amplitude, a high-precision and expandable automatic volume control circuit system is designed ...