一、伴音电路的组成伴音电路是指伴音信号经过的通路。严格地说,从天线接收信号到扬声器发出声音的所有伴音信号经过的电路都属于伴音电路,而习惯上所说的伴音电路是指第二伴音中频以后伴音信号单独经过的通路。图1所示是伴音电路的组成框图。从图中可以看出,伴音电路主要由伴音解调电路、 First, the composition of the audio circuit Sound circuit is accompanied by sound signal path. Strictly speaking, all the sound signals from the antenna to the loudspeaker to sound through the circuit belong to the sound circuit, and the sound circuit is customarily used to refer to the path through which the accompanying sound signal passes after the second sound intermediate frequency. Figure 1 shows the sound block diagram of the circuit. As can be seen from the figure, the audio circuit mainly by the audio demodulation circuit,