Worked Example: Class 5: Common Emitter Amp
Problem: common emitter amp
Design a common-emitter amp to the following specs:
- V+ = 20V
- f3dB = 100 Hz (approx.)
- gain = -100 at quiescent point.
- IC quiescent = 0.5 mA
Questions:
- What is the amp's gain--
- when the output swings to about + 15v?
- when the output swings to about + 5v?
- What is the amp's Zout?
(We omit answers to these quantitative questions, in this Webpage excerpt.)
Solution
This time we will set out the solution simply by drawing a circuit with explanatory `balloons.'
