63.6. Voltage Gain Analysis

Try these first

1. 1.

   What is voltage gain?

   Hint

   Consider how amplifiers increase voltage.

2. 2.

   Define input capacitance.

   Hint

   Think about how signals interact with amplifier inputs.

3. 3.

   What is the primary advantage of a cascode amplifier?

   • Increased power consumption
   • Improved bandwidth
   • Lower gain

   Hint

   Remember why cascode configurations are preferred.

4. 4.

   True or False: The input capacitance of a cascode amplifier is typically higher than that of a common emitter amplifier.

   • True
   • False

   Hint

   Consider the capacitive effects on frequency response.

5. 5.

   Design a cascode amplifier with given specifications: a target voltage gain of 150, using specific BJTs with set beta values. Calculate the necessary resistance values for biasing.

   Hint

   Remember the relationships between current, voltage, and resistances in the amplifier circuits.

6. 6.

   Evaluate the impact of varying Early voltage from 100V to 200V on the voltage gain of a BJT in a cascode configuration. What will be the expected changes?

   Hint

   Consider how output impedance influences performance in amplifiers.