SCA demodulator circuit diagram
Source: InternetPublisher:石榴姐 Keywords: demodulator circuit diagram carrier Updated: 2021/07/23
As shown in the figure, the frequency of the voltage controlled oscillator NE565 in this circuit is 67KHz, which is locked by the input 67KHz subcarrier component . The subcarrier is used for uninterrupted advertising background music played by FM radio stations. This circuit demodulates FM sidebands The signal is sent to the advertising sound system through a suitable filter. A 5k ohm potentiometer is used to lock the VCO at the exact frequency. The frequency response extends to 7KHz.
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