57.2. Lecture – 57

Try these first

1. 1.

   What does the term 'current gain' (β) signify in a transistor?

   Hint

   Think about the relationship between input and output currents.

2. 2.

   Define what a Darlington pair is.

   Hint

   Consider its application in operational amplifiers.

3. 3.

   What is a composite transistor?

   • A single transistor
   • Two transistors treated as one
   • A series of resistors

   Hint

   Recall how we discussed analyzing transistors together.

4. 4.

   True or False: The β of a composite transistor is simply the average of the β of its constituent transistors.

   • True
   • False

   Hint

   Consider the relationship between the two transistors.

5. 5.

   Design a composite transistor amplifier circuit using both CC and CE configurations. Explain the expected performance metrics.

   Hint

   Consider how each configuration affects the input and output properties.

6. 6.

   In a given circuit with two transistors having β1 = 50 and β2 = 150, calculate the overall β of the composite transistor.

   Hint

   Remember the derivation we discussed during the session.