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Class 12
Physics
Semiconductor Electronics
two amplifiers are connected one after the other i...

Question:
Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the output ac signal.

Answer:

Given that,

Voltage gain of the first amplifier, V ₁ = 10

Voltage gain of the second amplifier, V ₂ = 20

Voltage of input signal, V _i= 0.01 V

Voltage of output AC signal = V _o

The total voltage gain of a two-stage cascaded amplifier is given by the product of voltage gains of both the stages,

i.e., V = V ₁× V ₂= 10 × 20 = 200

It can be calculated by the relation: V = V_o/V_i

V₀ = V × V _i = 200 × 0.01 = 2 V

Therefore, the output AC signal of the given amplifier is 2 V.

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Question:
Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the output ac signal.

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Question: Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the output ac signal.

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Question:
Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the output ac signal.