Digital audio signal receiver - includes circuit removing modulation noise by adjusting duty rate to provide original PCM signal

摘要

The receiver comprises an input receiver circuit (10) to receive digital audio signals, a first wave form circuit (20) to remove noise components from the signal, a first low-pass filter (30) to integrate the signal and adjust the duty rate, a second wave form circuit (40) to remove d.c. noise components, a second low-pass filter (50) to control duty rate from the circuit (40) to 50%, a comparator (70) to compare output of the filter with a reference voltage (Vref) and a demodulator (60) to restore the original PCM signal. ADVANTAGE - Restores signal quality through removal of jitter etc.