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If an amplifier with gain of – 1000 and feedback of b = – 0.1 had a gain change of 20% due to temperature, then change in gain of the feedback amplifier would be __________ % .
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- 0.002%
- 0.2%
- 2%
- 2.2%
Correct Option: B
| Af = | ||
| 1 + βA |
| ∴ | = | |||
| ∂A | (1 + βA)2 |
| ⇒ ∂Af = | ||
| (1 + βA)2 |
| ∴ | = | |||
| ∂A | 1 + Aβ |
| ⇒ | = | = | = 0.2% | |||
| Af | 1 + 100 | 100 |
