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四、通话电路徒弟:何为通话电路,它是如何组成的? 师傅:通话电路又称之为送、受话电路,它是电子电话机的主要组成部分。通话电路主要由三个部分组成:①送话放大器②受话放大器③消侧音电路。送话放大器将发话人的声音信号转换为电信号并进行功率放大,然后输送至外线。受话放大器则是将由外线输入的电信号进行放大,然后再将这一电信号还原为声音信号。送、受话放大器通过消侧音进行连接。
Fourth, call the circuit apprentice: What is the call circuit, how is it composed? Master: call circuit, also known as send, receiving circuit, which is the main part of the electronic phone. The call circuit is mainly composed of three parts: ① sending speaker ② receiver amplifier ③ side-tone circuit. The transmitting amplifier converts the caller’s voice signal into an electrical signal and power-amplifies the signal, which is then transmitted to the outside line. Receiver amplifier is the signal input by the external amplification, and then restore the electrical signal to a sound signal. Send, receiver amplifier connected through the cancellation of side sound.