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A demodulator circuit contains...

A demodulator circuit contains

A

A diode

B

A transistor

C

A solar cell

D

Logic gate

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about what a demodulator circuit contains, we can break it down into the following steps: ### Step 1: Identify the Components of a Demodulator A demodulator circuit is primarily used to recover the original signal from a modulated carrier wave. The essential components of a demodulator include a diode and a capacitor. ### Step 2: Understand the Function of the Diode The diode in the demodulator circuit serves as a rectifier. It allows current to flow in one direction only, which is crucial for extracting the envelope of the modulated signal. ### Step 3: Role of the Capacitor The capacitor is used to smooth out the rectified signal. It charges and discharges to create a smoother output that represents the original audio signal. ### Step 4: Explain the Demodulation Process Demodulation is the process of extracting the original information-bearing signal from the carrier wave. This is typically done through envelope detection, where the envelope of the modulated signal is detected and the carrier wave is removed. ### Step 5: Describe the Stages of Demodulation The demodulation process can be divided into two main stages: 1. **Envelope Detection**: This stage detects the envelope of the modulated signal. 2. **Averaging Stage**: This stage produces an average envelope of the signal and computes a threshold value to compare with the averaged signal. ### Step 6: Conclusion In conclusion, the demodulator circuit primarily contains a diode and a capacitor, which work together to recover the original audio signal from the modulated wave. ### Final Answer The correct answer is that a demodulator circuit contains a diode and a capacitor. ---
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