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本文主要介绍了小型语言扩音机指触式控制开关、多频前置电路、OTL 放大器电路。由于采用了小型单方向驻极体传声器作内接传声器及小型扬声器箱,整机结构小巧、精致、使用方便可靠。
This article mainly introduces the small language megaphone finger touch control switch, multi-frequency pre-circuit, OTL amplifier circuit. As a result of a small one-way electret microphone for the internal microphone and a small speaker box, the whole structure of small, sophisticated, easy to use and reliable.