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← 4.3 Transistor

Building a simple amplifier

Electrical Technology · Grade 10 · about 40 minutes

How a common-emitter stage with bias resistors and coupling capacitors amplifies a small sound into an earpiece.

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Other lessons in this sub-strand

  1. The transistor
  2. The bipolar junction transistor
  3. NPN and PNP structure
  4. Base, collector and emitter
  5. Transistor circuit symbols
  6. Biasing the two junctions
  7. Current gain (beta)
  8. Cut-off, active and saturation
  9. The transistor as a switch
  10. The transistor as an amplifier
  11. Voltage-current characteristics
  12. Selecting a transistor
  13. Testing a transistor
  14. Building a transistor switch
  15. Building a simple amplifier
  16. Why transistors matter