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课程名称：电子学：半导体与PN结二极管 课程概述： 半导体是电导率介于导体与绝缘体之间的材料，具有独特的性质，使其在控制电流方面表现出色。半导体的导电性可以通过掺入杂质（掺杂）或施加电场、光或热来调节。半导体的类型主要分为：1. 本征半导体：纯半导体，如硅（Si）和锗（Ge）。2. 外延半导体：掺杂的半导体，添加了杂质以增加导电性，分为a. n型半导体：掺入能够提供额外电子（负载流子）的元素。b. p型半导体：掺入能够产生孔（正载流子）的元素。半导体是现代电子设备的基础，广泛用于二极管、晶体管、集成电路（IC）和LED。 二极管是由半导体材料制成的两端电子设备，主要功能是允许电流单向流动，而阻止反向流动。二极管是通过将p型半导体与n型半导体结合而形成的PN结。PN结二极管的工作原理包括：a. 正向偏置：当电池的正极连接到p侧，负极连接到n侧时，二极管允许电流流动。b. 反向偏置：当极性反转时，二极管阻止电流流动。 PN结二极管的应用包括整流、波形整形、保护电路、信号解调及光发射。本课程将详细讨论整流和波形整形电路的应用。 学习内容： 第一部分：半导体概述 1. 固体的能带分类 2. 半导体的类型 3. 平衡载流子浓度 4. 直接与间接带隙半导体 5. 载流子输运 6. 爱因斯坦关系 7. 半导体示例 第二部分：PN结二极管 8. PN结二极管的工作原理 9. 内建电势 10. 缺陷区宽度 11. 二极管电流-电压关系 12. 二极管的I-V特性 13. PN结二极管示例 14. 二极管等效电路 15. 荷载线分析 16. 二极管的小信号模型 17. 二极管电路示例 第三部分：二极管整流电路 18. 整流电路 19. 半波整流器 20. 全波整流器 21. 中心抽头变压器整流器 22. 带电容滤波的半波整流器 23. 带电容滤波的全波整流器 24. 中心抽头全波整流器示例 25. 桥式整流器与中心抽头变压器整流器的比较 第四部分：波形整形电路 26. 波形整形电路 27. 剪辑电路 28. 串联正剪辑器 29. 串联负剪辑器 30. 带正偏置的串联正剪辑器 31. 带负偏置的串联正剪辑器 32. 带正偏置的串联负剪辑器 33. 带负偏置的串联负剪辑器 34. 并联正剪辑器 35. 并联负剪辑器 36. 带正偏置的并联正剪辑器 37. 带负偏置的并联正剪辑器 38. 带正偏置的并联负剪辑器 39. 带负偏置的并联负剪辑器 40. 双重剪辑器 41. 冲击器电路 42. 正冲击器 43. 负冲击器 44. 带正偏置的正冲击器 45. 带负偏置的正冲击器 46. 带正偏置的负冲击器 47. 带负偏置的负冲击器 48. 如何创建双重剪辑器？ 第五部分：齐纳二极管简介 49. 齐纳二极管 50. 齐纳二极管的I-V特性 51. 齐纳二极管与普通二极管的比较 52. 温度效应 53. 齐纳二极管的规格 54. 基本齐纳稳压电路 55. 齐纳二极管电路示例 56. 齐纳二极管的优缺点及应用 通过本课程，你将深入了解半导体的基本知识和PN结二极管的工作原理及其在电子电路中的应用。
A semiconductor is a material whose electrical conductivity lies between that of a conductor and an insulator. Semiconductors have unique properties that make them ideal for controlling electrical current. Their conductivity can be manipulated by adding impurities (doping) or by applying electrical fields, light or heat.Types of Semiconductors:1. Intrinsic semiconductors: Pure semiconductors (e.g. Si and Ge).2. Extrinsic semiconductors: Doped semiconductors with added impurities to increase conductivity. a. n-type semiconductors: Doped with elements that added extra electrons (negative charge carriers). b. p-type semiconductors: Doped with elements that create holes (positive charge carries)Semiconductors are the foundation of modern electronics used in diodes, transistors, ICs and LEDs.A diode is a two terminals electronics device made from a semiconductor. Its primary function is to allow current flow in one direction and block it in opposite direction. A diode is created by joining a p-type semiconductor with an n-type semiconductor, forming a PN junction. Working principle of a PN junction diode:a. Forward Bias: When the positive terminal of a battery is connected to the p-side and the negative terminal is connected to the n-side, the diode allows current to flow.b. Reverse Bias: When the polarity is reversed, the diode blocks the current to flow.Applications of a PN junction diode are rectification, Clipper, clamper, protection circuits, signal demodulation and light emission. We will discuss rectification and wave shaping circuits applications in detail in this course.In this course, you will learn aboutSection-1: Introduction to Semiconductors1. Classification of solids on the basis of energy bands2. Types of semiconductors3. Equilibrium carrier concentration4. Direct and indirect band gap semiconductors5. Carrier Transport6. Einstein's Relation in semiconductors7. Example of semiconductorsSection-2: PN Junction Diode8. Working of PN junction diode9. Built in potential10. Width of depletion region11. Diode current-voltage relation12. V-I characteristics of diode13. Example of PN junction diode14. Diode equivalent circuit15. Load line analysis16. Small signal model of diode17. Example of diode's circuitSection-3: Diode Rectifier Circuits18. Rectifier circuits19. Half-wave rectifier20. Full-wave rectifier22. Centre tapped transformer rectifier21. Half wave rectifier with capacitor filter23. Full wave rectifier with capacitor filter24. Example of a Centre tapped full-wave rectifier25. Bridge rectifier Vs Centre tapped transformer rectifierSection-4: Wave Shaping Circuits26. Wave shaping circuits27. Clipper Circuits28. Series positive clipper29. Series negative clipper30. Series positive clipper with positive bias31. Series positive clipper with negative bias32. Series negative clipper with positive bias33. Series negative clipper with negative bias34. Shunt positive clipper35. Shunt negative clipper36. Shunt positive clipper with positive bias37. Shunt positive clipper with negative bias38. Shunt negative clipper with positive bias39. Shunt negative clipper with negative bias40. Dual clipper41. Clamper circuits42. Positive clamper43. Negative clamper44. Positive clamper with positive bias45. Positive clamper with negative bias46. Negative clamper with positive bias47. Negative clamper with negative bias48. How can you create a dual clipper?Section-5: Introduction to Zener diode49. Zener diode50. V-I characteristics of Zener diode51. Zener diode Vs Normal diode52. Temperature Effects53. Specifications of Zener diode54. Basic Zener regulator circuits55. Example of Zener diode circuit56. Advantages, disadvantages and applications of Zener diode
