PHY – Voltage amplifier stages having the characteristics
Subject: Engineering   / General Engineering
Question
Problem B.1 Design
Voltage amplifier stages having the characteristics show in the following table are available. The signal source has an open-circuit voltage of 20mV rms and an internal resistance of 2M?. The load is a 20?resistance. Design a cascade amplifier using smallest number of stages that provides at least 1 W to the load. What are the values of the input resistance, the output resistance and the open-circuit voltage gain of your amplifier?
Amplifier stage type
Open circuit Voltage gain
Input Resistance
Output Resistance
A
1
10 M?
1 k?
B
5
1 k?
1 ?
C
10
20 k?
100 ?

