Voltage Multiplier (Frequency Mixer)

Thread Starter


Joined May 3, 2010
Hi all, quick question. In class last term we had learned about how signal transmission worked through modulation/demodulation of frequency responses. Anyway, in order to shift the frequency responses we learned that this can be done by multiplying the signal by a sinusoid (generated by an oscillator).

My question is, what is the circuit that is used to multiply the signal of interest by the oscillator's sinusoid to shift the frequency response into the FM/AM band?

We were just shown the black box but I am just curious.