🔍 Key Concepts

• FM (frequency modulation) vs AM (amplitude modulation) detection methods • What a discriminator circuit does in radio receivers • Which circuits are typically used for SSB (single sideband) or AM detection rather than FM

💭 Think About

• Ask yourself: which type of detector responds to changes in frequency, not changes in amplitude or phase? • Look at each option and recall what kind of modulation it is normally associated with (AM, SSB, FM, or audio/phase processing). • Which of these circuits is found in the IF/audio section of an FM receiver to convert frequency variations into voltage variations?

✅ Before You Answer

• Identify which option is specifically designed to convert frequency deviations into an output voltage. • Eliminate circuits you know are mainly used for SSB or AM detection (product detector, balanced modulator). • Make sure the circuit you pick is one you’ve seen discussed in the context of FM receiver demodulation.