30.3.2. Voltage Swing and Drop Across Resistors

Try these first

1. 1.

   What is the formula for voltage gain in common emitter amplifiers?

   Hint

   Consider how gm and RC relate to the amplifier's operation.

2. 2.

   Define quiescent current.

   Hint

   Think about its importance to the operating point.

3. 3.

   What is the maximum theoretical gain in a common emitter amplifier determined by?

   • Supply Voltage
   • Transconductance and Load Resistance
   • Collector Current
   • Base Voltage

   Hint

   Think about what parameters define gain.

4. 4.

   True or False: Output swing can be increased by lowering the quiescent current.

   • True
   • False

   Hint

   Consider the effects of current on operating points.

5. 5.

   Design an amplifier circuit with required specifications: gain = 100, swing = ±5V, and power dissipation limits at 50mW. Provide component values and reasoning.

   Hint

   Consider the relationship between gain, RC, and quiescent point to balance voltage.

6. 6.

   Given a transistor with a β of 150, design a common emitter layout for a gain of 150. Establish required input and feedback capacitor values to maintain performance constraints.

   Hint

   Review how β affects input/output currents in amplifier design.