54.3.2. Input Impedance Consideration

Try these first

1. 1.

   What is input impedance?

   Hint

   Think about how much signal the circuit can accept without loss.

2. 2.

   Explain the significance of voltage swing in amplifier design.

   Hint

   Consider the maximum and minimum output voltages.

3. 3.

   What dictates the input impedance of an amplifier?

   • Supply Voltage
   • Resistor Values
   • Gain Factor

   Hint

   Look at how resistors interact within the circuit.

4. 4.

   True or False: Lower input impedance allows better signal preservation.

   • True
   • False

   Hint

   Think about how impedance affects current draw.

5. 5.

   Design a common gate amplifier with a specified input impedance of 300Ω and output swing of ±3V using a supply of 9V. Discuss the challenges faced in achieving this.

   Hint

   Consider how resistors affect the overall circuit beyond just the values.

6. 6.

   Given a scenario where the output swing is insufficient, propose modifications to the existing circuit components to meet specification without altering the topology.

   Hint

   Think about what changes would offset the limitations encountered.