One of the following cannot be used to demodulate SSB:

Solution (By Examveda Team)

Single Sideband (SSB) modulation is a form of amplitude modulation (AM) where one of the sidebands is removed, leaving only one sideband (either upper or lower). Demodulating SSB requires a method to recover the original signal from the modulated carrier wave.

The correct answer is Option D: Complete phase-shift generator. A complete phase-shift generator is typically used for generating phase-shift keying signals and is not suitable for demodulating SSB signals. SSB demodulation typically requires a product detector or other balanced modulators to extract the original information from the modulated signal.

Why the other options are correct:
Option A: Product detector – A product detector is commonly used for demodulating both AM and SSB signals by multiplying the received signal with a local oscillator signal. It helps recover the original audio or information signal from the modulated carrier.

Option B: Diode Balance modulator – A diode-balanced modulator can be used for SSB demodulation by performing a similar function as the product detector, where the signal is mixed with a local oscillator to recover the baseband signal.

Option C: Bipolar transistor balanced modulator – A bipolar transistor balanced modulator is also suitable for demodulating SSB signals, as it can mix the received SSB signal with a local oscillator signal to reconstruct the original message.