What component is block 50 in Fig. 8A1?

Question 1 of 27070YIL6mq9XdjrYPKN1ftop

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Question 1 of 27070

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What component is block 50 in Fig. 8A1?

🔍 Key Concepts

• Superheterodyne receiver block layout (RF amplifier, mixer, local oscillator, IF amplifier, detector, audio stages) • Function of a discriminator vs a detector in FM/AM receivers • Purpose of AFC (Automatic Frequency Control) and which stage it connects to

💭 Think About

• Think about where block 50 sits in the signal chain: is it before or after the audio output stages? Before or after the IF amplifier? • Ask yourself: at block 50, is the signal still at intermediate frequency, or has it already been converted to audio frequency? • Consider which component would feed an AFC circuit: does the raw IF go into AFC, or does the receiver use a control voltage derived from another stage?

✅ Before You Answer

• Check whether block 50 connects directly to the loudspeaker or audio amplifier (more likely a detector/discriminator) or back to the local oscillator (more likely AFC-related). • Verify if the symbol or note near block 50 shows frequency‑to‑voltage conversion (discriminator) or simple envelope detection (crystal detector). • Confirm whether any arrows from block 50 go to an AFC loop; if so, consider whether that block is an AFC amplifier or the stage that provides the AFC control signal.