Advertisements
Advertisements
प्रश्न
Figure shows a block diagram of a detector for amplitude modulated signal. Identify the boxes ‘X’ and ‘Y’ and write their functions.
उत्तर
In this case the box X is a Rectifier while the box Y is an Envelope Detector.
The functions of the two boxes are —
Rectifier — It is used to convert the pure AC waveform to a pulsating DC waveform. This is needed to produce a constant voltage supply.
Envelope Detector — It is used to detect the modulating signal by separating it from the input AM wave.
APPEARS IN
संबंधित प्रश्न
Write the functions of three segments of a transistor.
Draw a circuit diagram of a transistor amplifier in CE configuration.
Define the terms : Input resistance How are these determined using typical input and output characteristics?
Under what condition does the transistor act as an amplifier?
Derive an expression for voltage gain of the amplifier and hence show that the output voltage is in opposite phase with the input voltage.
Figure shows a block diagram of a transmitter identify the boxes ‘X’ and ‘Y’ and write their functions.
Consider an amplifier circuit using a transistor. The output power is several times greater than the input power. Where does the extra power come from?
Draw a circuit diagram for the common emitter transistor amplifier. What is meant by phase reversal?
In common emitter amplifier, the current gain is 62. The collector resistance and input resistance are 5 kΩ and 500 Ω respectively. If the input voltage is 0.01 V, the output voltage is:
A pnp transistor is used in common-emitter mode in an amplifier circuit. A change of 40 µA in the base current brings a change of 2 mA in collector current and 0.04 V in base emitter voltage. Which of the following is the correct value of the input resistor Rin?
