30.2.2. Resistance and Capacitor Values

Try these first

1. 1.

   What does β represent in a transistor?

   Hint

   Think of it as a measure of amplification.

2. 2.

   How do we calculate the quiescent current in a circuit?

   Hint

   It’s the steady-state current in the absence of input.

3. 3.

   What is the primary role of power dissipation in amplifier circuits?

   • To amplify the input signal
   • To convert electrical energy into heat
   • To stabilize the output signal

   Hint

   Consider the balance between energy use and component safety.

4. 4.

   True or False: The quiescent current is the maximum current flowing through a transistor.

   • True
   • False

   Hint

   Reflect on the definition of quiescent.

5. 5.

   Calculate the required capacitors C1 and C2 if R is 10k and you desire a lower cutoff frequency of 20Hz.

   Hint

   Ensure you plug in correct values and calculate in microfarads.

6. 6.

   If using a BJT with β = 150, calculate base current required if desired collector current is 3mA.

   Hint

   Understand I_B is always much smaller than I_C.