Answer to Question #87657 in Quantum Mechanics for Shivam Nishad

Question

A modulator circuit contains carrier frequency generator but the demodulator does
not require it. Explain by taking any one example.

Answer 1

A useful signal is transmitted by modulating a high-frequency signal, so a high-frequency generator is needed. When demodulating the high-frequency component, it is necessary to get rid of it; this can be done in different ways, for example, using high-frequency filters, without using a high-frequency signal generator.