69.1.1. Multi-Transistor Amplifiers: Amplifier with Active Load (Contd.) – Numerical Examples (Part B)

Try these first

1. 1.

   What is early voltage in a transistor?

   Hint

   Think about how early voltage relates to transistor performance.

2. 2.

   How does connecting a resistor to the output node instead of ground affect amplifier stability?

   Hint

   Consider what 'negative feedback' means.

3. 3.

   What is Early Voltage?

   • The voltage at which collector current decreases.
   • The voltage required for saturation.
   • The maximum voltage the transistor can handle.

   Hint

   Consider how Early Voltage pertains to transistor characteristics.

4. 4.

   True or False: Negative feedback can destabilize an amplifier's output voltage.

   • True
   • False

   Hint

   Reflect on how feedback is utilized in amplifier design.

5. 5.

   Design an amplifier circuit with an active load that maintains a stable output voltage despite β variations. Consider all parameters and justify your choices.

   Hint

   Reflect on previous designs and incorporate stability measures.

6. 6.

   Analyze a scenario where both early voltage and β shift simultaneously. Calculate expected performance metrics including output swing limits.

   Hint

   Jointly consider both parameters and how they affect current relations.