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GATE EC 2014 Set 2 — Question 23

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NAT+1 / -0MediumMultistage AmplifiersBJT & MOSFET AmplifiersAnalog Circuits

Analog Circuits → BJT & MOSFET Amplifiers → Multistage Amplifiers

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Question

A cascade connection of two voltage amplifiers A1 and A2 is shown in the figure. The open-loop gain Av0A_{v0}, input resistance RinR_{in}, and output resistance RoR_o for A1 and A2 are as follows:
A1: Av0=10,Rin=10 kΩ,Ro=1 kΩA_{v0} = 10, R_{in} = 10\text{ k}\Omega, R_o = 1\text{ k}\Omega.
A2: Av0=5,Rin=5 kΩ,Ro=200 ΩA_{v0} = 5, R_{in} = 5\text{ k}\Omega, R_o = 200\text{ }\Omega.
The approximate overall voltage gain vout/vinv_{out}/v_{in} is __________.
Cascade connection of two voltage amplifiers A1 and A2 with input $v_{in}$, output $v_{out}$, and a load resistor $R_L = 1\text{ k}\Omega$
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