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The transistor gain of the circuit shown in the figure is given by
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R2 + R3 
R1
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Correct Option: A
| = | + | ||||
| R3 | R4 | R2 |
(A and B can be measured to be the same potential)
| VC = | ||||
| R3 | R2 R3 + R3 R4 + R4R2 |
| = VO | ||
| R2 R3 + R3 R4 + R4R2 |
| Then | + | = 0 | ||
| R2 | R1 |
| ∴ VO . | = - | |||
| R2 R3 + R3 R4 + R4R2 | R1 |
∴ Transfer gain,
| = - |  |  | |||||
| Vi | R1 | R4 |
| = - | | R2 + R3 + | | |||
| R1 | R4 |
