Application circuit diagram of LH4500 image and sound amplifier circuit

LH4500 is an integrated circuit of all small signal processing circuits except high frequency head. Its biggest feature is the noise suppression function, that is, the sound noise is automatically turned off when there is no receiving signal. Other functions include: intermediate frequency amplification and synchronous demodulation. AGC detection

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D7680AP voltage value of each foot during normal operation

The voltage value of each leg when the LH4500 is working normally