Electronics and Communication Engineering - Matching Questions - Discussion

3. 

Match the following:

List I (Circuit) List II (Characteristics)
A.Darlington pair1.uses pnp and npn transistors used as power amplifier
B.CB amplifier2.Voltage gain nearly 1 and high input impedance
C.Cascade amplifier3.low input impedance used for high frequency isolation

[A]. A-1, B-2, C-3
[B]. A-2, B-3, C-1
[C]. A-2, B-1, C-3
[D]. A-3, B-1, C-2

Answer: Option B

Explanation:

No answer description available for this question.

Garima said: (Mar 20, 2015)  
How? Please describe the answer for me.

Shivanshu said: (May 10, 2017)  
The Common base has highest input impedance. Hence max. Part of I/p goes it. Because of resistance divider circuit. Formed between I/p impedance and series resistance. Hence can be used for isolation. It's current gain is 1. But voltage gain can be any value.

Hence b-- (3).

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