Discussion
| List - I (Amplifier type) | List - II (Circuit/property) |
|---|---|
| (a) RC coupling | (i) Higher voltage gain and impedence matching. |
| (b) Inductive coupling | (ii) Ability to amplify dc and low frequency signal. |
| (c) Transformer coupling | (iii) Minimum possible non-linear distortion |
| (d) Direct coupling | (iv) Low collector supply voltages can be used. |
Codes :
(a) (b) (c) (d)
Answer: B
The matching is (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii), which is option (B). RC coupling gives the least non-linear distortion. Inductive (choke) coupling has little dc drop across the choke, so a low collector supply voltage can be used. Transformer coupling gives higher voltage gain together with impedance matching, and direct coupling can amplify dc and very low frequency signals because there is no coupling capacitor. Options (A), (C) and (D) pair direct coupling or transformer coupling with the wrong property.
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