51.1.5. Voltage Gain Calculation

Try these first

1. 1.

   Define voltage gain.

   Hint

   Think about how we measure output relative to input.

2. 2.

   What does low input impedance often lead to?

   Hint

   Recall how input resistance can affect signal quality.

3. 3.

   What is the formula for voltage gain in a common base amplifier?

   • V_out / V_in
   • I_out / I_in
   • R_out / R_in

   Hint

   Think about the definition of voltage gain.

4. 4.

   True or False: An increase in input impedance generally increases voltage gain.

   • True
   • False

   Hint

   Consider how input impedance affects the loading of the signal source.

5. 5.

   In a common base amplifier, if R_s is increased to 20K Ohm and R_C is 5K Ohm, analyze the trade-off between gain and bandwidth.

   Hint

   Reflect on how higher R_s would change our calculated voltage gain.

6. 6.

   For an amplifier with a transconductance of 40 mS and output resistance of 10K Ohm, calculate the output voltage if input voltage is 0.1V.

   Hint

   Analyze the relations among transconductance, resistance, and voltage gain.