PN Junction Diode – Notes – 1

Electronics Engineering » PN Junction Diode » Notes

1. When a semiconductor chip contains an N doped region adjacent to a P doped region, a diode junction(often called a PN junction) is formed.

2016-06-19_16-41-14Figure-1 : PN Junction Diode

2. The impurities added to an N type region increases the number of electrons capable of conducting charge, while the impurities added to a P type region increase the number of holes that are capable of conducting charge.

3. In a diode, the P material is called the anode. The N material is called the cathode.

2016-06-19_16-41-27Figure-2 : Anode & Cathode in PN Junction Diode

4. Diodes are useful because electric current will flow through a PN junction in one direction only.


Figure-3 : Direction of Current in PN Junction Diode

5. When the diode is connected so that the current is flowing, it is said to be forward biased. In a forward biased diode, the anode is connected to a higher voltage than the cathode.

Figure-4 : Forward Biased PN Junction Diode

Subject Name : Electronics Engineering
Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant
Electronics & Communication Engineering Books

Question Bank On Electronics & Communication Engineering
Book - question bank on electronics & communication engineering; Language: english; Binding: paperback
₹ 316
A Handbook for Electronics Engineering(Old Edition)
Made Easy Editorial Board (Author); Marathi (Publication Language); 620 Pages - 01/01/2015 (Publication Date) - Made Easy Publications (Publisher)
₹ 320
Basic Electronic Devices and Circuits
Patil (Author); English (Publication Language)
₹ 495
Electronic Circuits: Analysis and Design (SIE) | 3rd Edition
Neamen, Donald (Author); English (Publication Language); 1351 Pages - 08/25/2006 (Publication Date) - McGraw Hill Education (Publisher)
₹ 499

GATE 2023 Total InfoENGG DIPLOMAUGC NET Total Info
IES 2023 Total InfoPSUs 2022 Total InfoCSIR UGC NET Total Info
JAM 2023 Total InfoM TECH 2023 Total InfoRAILWAY 2022 Total Info

Related Posts

  • PN Junction Diode - 12PN Junction Diode » Exercise - 112. The saturation current in a diode depends upon : (a) Plate voltage (b) Cathode temperature (c) Cathode material (d) Separation between cathode and plate
    Tags: diode, cathode, pn, junction, current, electronics, engineering
  • PN Junction Diode - 17PN Junction Diode » Exercise - 1& 17. Capacitive effects are exhibited by PN junctions when they are : (a) Forward biased (b) Reverse biased (c) Either forward or reverse biased (d) Neither forward nor reverse biased
    Tags: biased, forward, pn, junction, diode, electronics, engineering
  • PN Junction Diode - 37PN Junction Diode » Exercise - 137. The reverse current in a diode is of the order of ............ (a) kA (b) mA (c) microA (d) A
    Tags: diode, pn, junction, current, electronics, engineering
  • PN Junction Diode - 1PN Junction Diode » Exercise - 1 1. The depletion region is one which has : (a) Immobile charges (b) Mobile charges (c) Atoms (d) Molecules
    Tags: pn, junction, diode, region, electronics, engineering
  • PN Junction Diode - 38PN Junction Diode » Exercise - 138. The forward voltage drop across a silicon diode is about ............. (a) 2.5 V (b) 3 V (c) 10 V (d) 0.7 V
    Tags: diode, pn, junction, forward, electronics, engineering


Please enter your comment!
Please enter your name here