75.5.1. BJT and MOSFET Versions

Try these first

1. 1.

   What does a differential amplifier do?

   Hint

   Think about how it processes multiple input signals.

2. 2.

   Name one type of transistor used in differential amplifiers.

   Hint

   Remember the types we discussed.

3. 3.

   What is the main purpose of a differential amplifier?

   • To amplify only one input signal
   • To amplify the difference between two signals
   • To reduce signal noise

   Hint

   Consider the unique capability of the differential amplifier.

4. 4.

   True or False: A BJT is a voltage-driven device.

   • True
   • False

   Hint

   Recall the characteristics that differentiate BJTs from MOSFETs.

5. 5.

   Design a simple differential amplifier circuit using a BJT. Outline each component needed and their values for optimal performance.

   Hint

   Consider uniform resistance values and proper biasing currents to keep transistors in the active region.

6. 6.

   Discuss the challenges faced when implementing MOSFETs in differential amplifiers compared to BJTs and propose potential solutions.

   Hint

   Evaluate the strengths and weaknesses of both transistor types.