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Voltage amplifiers are available with Avoc= 8V/V, Rin = 1.8kOhms, Ro=850 Ohms. With a 12 V...

Voltage amplifiers are available with Avoc= 8V/V, Rin = 1.8kOhms, Ro=850 Ohms. 
With a 12 V DC power source, each amplifier consumes 1.5 mA average current.

a. How many amplifiers do you need to cascade to get at least a 1000 voltage gain with a load resistance of 1.0 kΩ?

b. What is the voltage gain Av obtained? (Respond with a rounded whole number)

c.For the cascade connection, find the open circuit voltage gain.

d. If you have a 1.5 mV input, how efficient is the equivalent amplifier?

e. Find the transconductance of the entire circuit.

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Answer #1

NA le Vo - Avec Vin Vothage Amplifier RL Vo RtR by woltage division rule X 8 X Vin 1.8K 1.88 0.85% for Re = 1.8k.12 ) Vo = Vopen Usuit veltage gain for castaded connection for 5th stage Ro & Aug = 8v Av =(5-434)** X8 = 6975.4 pen ciruit Equivalent a

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