walid Posted May 12, 2007 Report Share Posted May 12, 2007 Hithe folloing fig is the front end of a simple AM radio reciverIt contains the AM ferrite antenna and two variable caps, one connected // to the primary coil of the antenna and the other // to the primary coil of the red (local oscillator) transformer.AM sig freq from 530 KHZ to about 1600 KHz is tuned and go to the base of the transistor through 20n cap.the local osc connected to the emitter through 10n cap. its freq is always higher than the AM sig by 455 KHz.the o/p of this mixer at the transistor collector is 4 signals: the two signals and sum and the difference.That was a simple summary of circuit. My question is that i need a simplified explanation of the work of this mixer?thank you very much Quote Link to comment Share on other sites More sharing options...
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