Toshkent davlat transport universiteti

I CHAPTER. ROLE AND SIGNIFICANCE OF ELECTRONICS IN RAILWAY TRANSPORT
§ 1.1 Introduction......................................................................................................4
§ 1.2. Stages of development of electronics ………................................................4
§ 1.3. An overview of the main materials used in electronics and their properties. Electrical conductivity of solids......................................................................5
§ 1.4. p - n transition event ………………………………............................7
II CHAPTER. ELECTRICAL CONDUCTIVITY PROPERTIES OF SEMICONDUCTOR MATERIALS …………………………………………..15
§ 2.1. Distribution of energy levels........................................................................18
§ 2.2. Pure and mixed electrical conductivity…….................................................20
§ 2.3 Mixed Conductivity Semiconductors …………………................................22
§ 2.4. Generation and recombination processes in semiconductors ……...............25
III CHAPTER. p-n JUNCTION IN SEMICONDUCTOR MATERIALS, PRINCIPLES OF CREATING ELECTRONIC DEVICES ON ITS BASIS......................................................................................................................29
§ 3.1. p - n transition event.......................................................................29
§ 3.2. Semiconductor diodes……….......................................................................31
IV CHAPTER. MAIN TYPES, OPERATING PRINCIPLE AND PARAMETERS OF DIODES..............................................................................32
§ 4.1. Varicaps.......................................................................................................32
§ 4.2. Pulse Diodes..................................................................................................33
§ 4.3. LEDs.............................................................................................................36
§ 4.4. Zener diodes, p-n junction …......................................................................39
§ 4.5. Frequency characteristics of semiconductor diodes……….........................41