Amplitude modulator and demodulator

418

06:17:12

Amplitude modulator is really just a voltage controlled gain amplifier. By applying modulation signal (fm) to the carrier signal (fc), we get 3 frequencies: fc, fc - fm, fc + fm. So by modulating again we can get the original signal along with some high frequencies. We can fix this with a steep LP filter. (3rd order butterworth in this case)

published 8 years ago

592azy2circuitdude

8 years ago

That's cool. So signal (fm) is the signal to be transmitted (eg voice), and signal (fc) is the AM station that's tuned in to?

multistar444

7 years ago

precisely. fm is not to be confused with frequency modulation. I meant modulated frequency :)

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