37.1.9. Frequency Response of Common Emitter Amplifier

Try these first

1. 1.

   What is the role of the coupling capacitor in a common emitter amplifier?

   Hint

   Think of it as a gatekeeper for signals.

2. 2.

   Define transconductance (g_m) in your own words.

   Hint

   Consider the relationship between input voltage and output current.

3. 3.

   What does the small signal model of a transistor represent?

   • A linear model
   • A linear approximation
   • A non-linear model

   Hint

   Consider how we simplify complex circuits.

4. 4.

   True or False: The Bode plot can represent both gain and phase response of amplifiers.

   • True
   • False

   Hint

   Think about the purpose of Bode plots in circuit analysis.

5. 5.

   You have a common emitter amplifier with an input resistance of 1 kΩ and an input capacitor of 1 µF. Calculate the lower cutoff frequency.

   Hint

   Use a calculator with π for exact results.

6. 6.

   Given the output resistance of 2 kΩ and a load capacitor of 10 µF, calculate the upper cutoff frequency.

   Hint

   You should recall the significance of how load capacitance influences output frequencies.