19.1. Linearization of Non – Linear Circuit Containing BJT (Contd.)

Try these first

1. 1.

   Define linearization in terms of circuit analysis.

   Hint

   Think about simplifying complex behaviors.

2. 2.

   What does the term g_m represent?

   Hint

   This term contains the letter 'g'.

3. 3.

   What does a small signal equivalent circuit help us do?

   • Linearize the circuit
   • Complexify analysis
   • Reduce accuracy

   Hint

   Think of the goal of making analysis easier.

4. 4.

   True or False: The Q-point remains constant under varying signal conditions.

   • True
   • False

   Hint

   Remember what Q-point stands for in circuit analysis.

5. 5.

   Given a BJT operating at a collector current of 10 mA with a transconductance of 10 mS, calculate the base-emitter voltage required to maintain this current if the input base current is 0.1 mA.

   Hint

   Relate the transconductance to input and output relations.

6. 6.

   In a circuit, if r_π is given as 1.2 kΩ, and collector current I_c is 5 mA, what would be the expected input voltage to base assuming a small signal?

   Hint

   Recall the relationships between input current, base-emitter resistance, and how they affect voltage.