PCM PCM PULSE CODE MODULATION NOISE FILTERING CIRCUIT AND PULSE CODE MODULATION NOISE FILTERING APPARATUS COMPRISING THE SAME

摘要

According to an aspect of the present invention, a signal input terminal 110 is connected to the output side of the preamplifier 11 included in the acoustic device 10 and receives a digital coded (DAC) PCM sound signal. A PCM acoustic signal input through the signal input terminal 110 is input to a primary side, a PCM acoustic signal applied to a primary side is induced to a secondary side by mutual inductive action, and a high frequency component included in a PCM acoustic signal A matching transformer 120 for filtering the PCM noise of the input signal; And a signal output terminal 130 receiving the PCM sound signal filtered from the matching transformer 120 and outputting the PCM sound signal to the input side of the power amplifier 12 provided in the acoustic device 10, do.