Control unit of emergency broadcast
An emergency broadcasting and control unit technology, applied in broadcasting system control, broadcasting specific applications, etc., can solve the problems of complicated installation, poor compatibility, poor scalability, complicated circuit and structure, etc., to achieve simple circuit design and facilitate quantitative production. , the effect of low manufacturing cost
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[0018] Such as figure 1 As shown, an emergency broadcast control unit of the present invention includes a microphone module, a line audio module, a power supply module, a volume adjustment module, a source selection module, and a group selection module;
[0019] The microphone module includes two microphone audio inputs, the two microphone audio inputs are combined into one microphone audio source input by an adder, and then connected to the input end of the volume adjustment module through an audio amplification and pressure limit control module, so The output terminal of the volume adjustment module is connected to the input terminal of the source selection module through an operational amplifier, and the output terminal of the operational amplifier is also connected to a microphone volume indicator circuit;
[0020] The line audio module includes two line audio inputs, the two line audio inputs are accessed through six lotus sockets, and the two line audio inputs on each pair of...
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