48.1.7. Operating Point Calculation for Common Drain Amplifier

Try these first

1. 1.

   What is the formula to calculate the operating point of the transistor?

   Hint

   Consider Vdd and the diode drop.

2. 2.

   State the significance of the operating point.

   Hint

   Think about the effect of voltages and currents.

3. 3.

   What does the term 'operating point' refer to in a common drain amplifier?

   Hint

   Think about which point allows for effective transistor operation.

4. 4.

   True or False: The voltage gain of a common drain amplifier is always greater than one.

   • True
   • False

   Hint

   Recall our discussions on voltage gain.

5. 5.

   Given a common drain amplifier with Vdd = 15V, R_E = 5kΩ, and I_E = 2mA, calculate the output voltage.

   Hint

   Focus on the voltage drop across the emitter resistor.

6. 6.

   If the β of the transistor is 120 and the base current (Ib) is 10μA, calculate the collector current (Ic).

   Hint

   Recall the relationship between Ic and Ib in terms of β for the transistor.