Lecture-Ddddddddddddsdasdsaddsiodes.pptx

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1. DIODES

2. DIODES A diode is a semiconductor device that essentially acts as a one-way switch for current. It allows current to flow easily in one direction, but severely restricts current from flowing in the opposite direction

3. TYPES OF DIODES RECTIFIER DIODE LIGHT EMITTING DIODE SIGNAL DIODES POWER DIODES ZENER DIODES TUNNEL DIODES

4. RECTIFIER DIODE A rectifier is a special type of diode that converts alternating current (AC) into direct current (DC).

5. Testing Diode using DMM?

6. TESTING DIODE USING AMM

7. APPLICATIONS OF DIODES

8. What is and LED? A light-emitting diode (LED) is a semiconductor device that emits light when an electric current flows through it

9. HOW TO TEST AN LED?

10. SIGNAL DIODES They are designed to operate small currents and high-frequency signals which is why they are commonly used in radio, television, communication, and switching circuits .

11. POWER DIODES Simple diodes consist of a simple PN junction. They are smaller in size and lighter in weight, while power diodes are in modified form and they are larger and heavier normally. Power diodes are usually available in metal form

12. What is a Zener Diodes? The zener diode is used as a Shunt voltage regulator for regulating voltage across small loads.

13. How to test a Zener Diode?

14. OPERATIONS OF ZENER DIODES

15. TUNNEL DIODE A tunnel diode or Esaki diode is a type of semiconductor diode that has effectively "negative resistance" due to the quantum mechanical effect called tunneling. It was invented in August 1957 by Leo Esaki when working at Tokyo Tsushin Kogyo, now known as Sony.

16. PRINCIPLES OF TUNNEL DIODE

17. What is a PIN diode? A PIN diode is a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region. The p-type and n-type regions are typically heavily doped because they are used for ohmic contacts. The wide intrinsic region is in contrast to an ordinary p–n diode.