Electronics and Communication Engineering - Analog Electronics

11. 

When narrow current pulses drive a high Q resonant circuit the voltage across the circuit looks like

A. narrow pulses
B. half sine wave
C. almost sine wave
D. either (a) or (b)

Answer: Option C

Explanation:

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12. 

The multivibrator circuit that has a typical application of converting sinusoidal input into a square wave output is

A. emitter coupled binary
B. Schmitt trigger
C. monoshot multivibrator
D. free-running multivibrator

Answer: Option B

Explanation:

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13. 

Symbol shown in figure represents a

A. P-channel enhancement MOSFET
B. N-channel DEMOSFET
C. UJT with P-type base
D. UJT with N-type base

Answer: Option A

Explanation:

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14. 

The feedback resistance rd in small signal model of MOSFET is of the order of

A. 1000 MΩ
B. 1 MΩ
C. 1 KΩ
D. 100 Ω

Answer: Option A

Explanation:

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15. 

Which amplifier has a voltage gain of less than 1?

A. Common emitter
B. Common collector
C. Common base
D. Both CB and CC

Answer: Option B

Explanation:

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