3. Types of Semiconductor Devices

4. Diode

5. Forward & Reverse Bias

6. Transistor

7. Types of transistors

8. Queries Agenda

10. Unit which consists lagely or wholly,of semiconductor materials which can perform useful function in electronic apparatus & solid state research.

11. Ex:p-n jun diode,transistros,IC's and etc.

13. 1)Intrisic Semiconductors

14. 2)Extrinsic Semiconductors

15. Intrinsic Semiconductors:Tetravalent

16. Ex:Si,Ge etc

19. A p-n juncion diode is a two terminal device made up of semiconductor crystal.

20. P-N junction diode + - P-n junction diode ckt symbol

23. Conduction is due to thermal agitation. Depletion Layer B + - p n MA P-n junction-Reverse Bias

25. A transistor is a semiconductor device used to amplify and switch electronic signal.

26. Consist of two p-n junctions back to back

27. Has three regions:

28. 1)Emitter

29. 2)Base

30. 3)Collector

34. Current conduction is mainly due to electrons. E C B n n p Ckt symbol of n-p-n transistor n-p-n transistor

36. They're quite strong&sturdy.

37. Usually,they've long life.

38. Swithches turn on&off with the use of transistor.

40. fig to form a transistor? P N N P

41. THANK YOU