Extra exam question E7E11

WhyA product detector is the type used for demodulating SSB signals. A product detector is the type used to demodulate SSB signals, mixing the incoming suppressed-carrier signal with a locally generated carrier (the "product" of the two) to recover the original audio, since a simple envelope detector can't properly demodulate a signal that has no transmitted carrier to follow, answer C. A discriminator demodulates FM, and phase detectors and phase comparators are used in PLL and synthesis applications, not for recovering SSB audio.