1. DC Power supply DC V out RLRL AC ~ 110V ±10% 60 Hz

2. DC out RLRL AC ~ 110V ±10% 60 Hz ?

3. VZVZ V in RSRS Zener diode shunt voltage regulator V out = V Z I = (V in -V z ) /R s Example: V in = 12 V V z = 6 V I = 1 A W = 12 w Drawbacks: Heat V z fixed

4. I V out = V Z – 0.6 V I max =  *I VZVZ V in RSRS IbIb Add an emitter follower

5. VZVZ V in RSRS I IbIb A convention

6. V in RSRS I Adjustable V out

7. R1R1 R3R3 R4R4 +V in V out V out = R 3 + R 4 R4R4 V BE Using feedback

8. R1R1 R3R3 R4R4 +V in V out V out = R 3 + R 4 R4R4 (V BE + Vz) Improvement

9. +V in V out R4R4 Current limiting

10. R1R1 VZVZ R2R2 R3R3 +V in V out = R 2 + R 3 R3R3 VZVZ Using an op. amp.

11. LM78 XX V+ in 2 3 Available XX : 05, 08, 09, 10, 12, 15, 18, 24 (V), and etc. 1

12. V- in LM79 XX V- out

13. LM117/317 V in V out

14. A review of JFET p n p n p n Transistors

15. MOSFET + + - - - n - + + + + + + n-Si Al SiO 2 D S G Transistors

16. R1R1 R3R3 R4R4 +V in V out V out = R 3 + R 4 R4R4 V BE