66.5.1. Theoretical Limit of Gain

Try these first

1. 1.

   What is an active load?

   Hint

   Think about what components can dynamically adjust voltage.

2. 2.

   Describe the role of beta in transistor amplifiers.

   Hint

   Beta can be expressed as Ic/Ib.

3. 3.

   What component replaces passive load in an active load amplifier?

   • Resistor
   • Transistor
   • Capacitor

   Hint

   Consider which component can adapt to changes in signal.

4. 4.

   True or False: The voltage gain increases indefinitely with supply voltage.

   • True
   • False

   Hint

   Think about constraints in electronic circuits.

5. 5.

   If a common emitter amplifier has a quiescent collector current of 5 mA, and the resistor in the collector is 1 kΩ, what is the maximum voltage gain assuming V_T is approximately 26 mV?

   Hint

   Be mindful to convert units appropriately.

6. 6.

   Design a common source amplifier to achieve a minimum gain of 10. What characteristics must you consider in your setup?

   Hint

   Explore the relationship of overdrive voltage to threshold voltage.