54.2.2. Circuit Analysis

Try these first

1. 1.

   What is the relationship between supply voltage and output swing in a Common Gate amplifier?

   Hint

   Consider the limits imposed by the power supply.

2. 2.

   Define voltage gain in the context of amplifiers.

   Hint

   Think about how signals are amplified.

3. 3.

   Which amplifier configuration allows a greater input impedance?

   • Common Gate
   • Common Base
   • Neither

   Hint

   Think about how impedance is affected by signal paths in different configurations.

4. 4.

   True or False: The output swing of an amplifier can exceed the power supply voltage.

   • True
   • False

   Hint

   Reflect on the physical limitations of power supplies.

5. 5.

   Design a circuit using the Common Gate amplifier configuration that achieves an input impedance of 500Ω and requires output swing of ±8V from a 15V supply. Calculate necessary resistor values and explain your reasoning.

   Hint

   Use Ohm's Law and the input-output impedance relationships.

6. 6.

   If the Common Base amplifier needs to maintain at least 90% efficiency with an output swing of ±6V, calculate the minimum DC supply voltage required for the given circuit constraints.

   Hint

   Think about how supply voltages directly affect output capabilities.