====== Linear amplifier using emitter degeneration ======
  * R<sub>L</sub>=5k, R<sub>s</sub>=5k, R<sub>in</sub>=50k
  * Voltage gain=4
  * Maximize the output voltage swing with V<sub>cc</sub>=12V
  * Once you have a successful design with an NPN transistor, repeat it with a PNP transistor. What is the easiest way of modifying and testing the performance with a PNP transistor? 

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