Circuits

• (a) shows a simple transistor audio amplifier.  It operates in common-emitter mode giving around 40dB power gain;  C3 should be chosen to have a small impedance compared with R3 at working frequencies
• (b) shows an i.c. audio output stage.  The LM386 gives about 300mW;  R1 & C1 are for stability

Course Guide Topics

1. Diodes
2. Transformers
3. Power Supplies (1)
4. Power Supplies (2)
5. Power Supplies (3)
6. Power Supplies (4)
7. Power Supplies (5)
8. Transistor – Common Emitter
9. Transistor – Common Collector
10. Transistor – Common Base
11. Amplifiers – AF
12. Amplifiers – RF
13. Amplifiers – Biasing (1)
14. Amplifiers – Biasing (2)
15. Amplifiers – Biasing (3)
16. Distortion