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FM Wireless Microphone Circuit Diagram

2014-11-13 14:27  
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FM Wireless Microphone Circuit Diagram
The following measures are taken to promise a clear voice of the microphone: the output signal of MIC is first sent to BG1 to be amplified. R1 and C1 is the additional pre-emphasized high-pitch sound circuit. C2 and C3 is the input and output coupling capacitance of tube BG1, the value of which is relatively lower to reduce the low-pitch sound and raise the mid and high sound. The diodes D3 and D4, which is connected in parallel in the BG1 output end , and the circuits C4 and C7, make use of the feature of the internal resistance ‘s being lower when the diodes are conducted in forward direction and influence the strong signal by limiting the amplitude. However, the regular signals remains unaffected.