*Question E7E11:
Which type of detector is used for demodulating SSB signals?*  

*Correct Answer is  C: Product detector*  

### AI Response: (may contain errors)  

To demodulate Single Sideband (SSB) signals, the correct choice is:

**C: Product detector**

### Explanation of the Correct Answer:
- **Product Detector**: This type of detector is specifically designed for demodulating SSB signals. It works by multiplying the incoming SSB signal with a locally generated carrier signal. This process effectively recovers the original audio signal from the modulated carrier. The product detector is efficient and provides good performance in terms of fidelity and signal quality.

### Why the Other Choices are Incorrect:
- **A: Discriminator**: This device is primarily used for Frequency Modulation (FM) signals. It converts frequency variations in the incoming signal into amplitude variations, which is not suitable for SSB demodulation.

- **B: Phase Detector**: While phase detectors are used in phase-locked loops (PLLs) and can demodulate phase-modulated signals, they are not typically used for SSB signals. SSB requires a method that can handle amplitude variations effectively, which the phase detector does not do.

- **D: Phase Comparator**: Similar to the phase detector, a phase comparator is used in PLLs and is not designed for demodulating SSB signals. It compares the phase of two signals but does not effectively recover the audio from an SSB signal.

### Summary:
- The product detector is the most suitable choice for SSB demodulation due to its ability to recover the original audio signal by multiplying the SSB signal with a local oscillator. Other detectors like discriminators and phase detectors are not designed for this purpose and are better suited for other modulation types.