Introduction catalogue of electronic circuit video detailed explanation

Chapter 1 Types of electronic circuit diagrams and methods of converting complex circuits into simple circuits 1

1. 1 II Detailed Analysis of Common Circuits

Perceptual knowledge 1. 1 music doorbell circuit 2

1. 1.2 Understanding flashlight circuit 3

1.2 Basic methods of circuit analysis and types of electronic circuit diagrams 4

1.2. 1 circuit analysis method 4

1.2.2 a preliminary understanding of electronic circuit diagram 6

1.2.3 block diagram reading method 6

1.2.4 unit circuit diagram reading method 9

1.2.5 equivalent circuit diagram reading method 12

1.2.6 Identification method of integrated circuit application circuit diagram 12

1.2.7 Reading method of complete machine circuit diagram 14

1.2.8 Pattern recognition method for printed circuit boards 16

1.2.9 Drawing method during repair 17

1.3 circuit analysis method of breaking the whole into parts 18

1.3. 1 complex circuit decomposition analysis method 18

1.3.2 signal type and decomposition analysis method 19

1.3.3 piecewise analysis method of signal frequency 20

1.3.4 Analysis Method of Setting Zero to Integer in Circuit Analysis 22

Chapter 2 Important Characteristics of Resistors and Resistor Circuits 24

2. 1 symbols and important characteristics of common resistance circuits 25

2. 1. 1 common resistance circuit symbols and drawing information 25

2. 1.2 Important characteristics of common resistors 26

2. 1.3 Description of basic working principle of resistor 26

2.2 Analysis of main characteristics and working principle of series, parallel and series-parallel resistance circuits 28

2.2. 1 Analysis of main characteristics and working principle of resistance series circuit 28

2.2.2 Analysis of main characteristics and working principle of resistance parallel circuit 30

2.2.3 Working principle and main characteristics of series-parallel resistance circuit 32

2.3 Analyze and understand the working principle of resistance voltage dividing circuit 33

2.3. 1 Working principle of resistance voltage dividing circuit 33

2.3.2 Analysis and Understanding of Output Voltage of Voltage Divider Circuit 34

2.3.3 Working Principle of Resistance Divider Circuit with Load Circuit 35

2.4 Analysis and understanding of the working principle of resistance circuit 36

2.4. 1 DC voltage source resistance circuit and fault handling method 36

2.4.2 AC signal voltage transmission resistance circuit and DC step-down resistance circuit 37

2.4.3 Analyze and understand the working principles of various isolation resistance circuits 38

2.4.4 Analysis and understanding of the working principle of resistance circuit from current change to voltage change 39

2.4.5 resistor shunt circuit and damping resistor circuit 40

2.4.6 Analyze and understand the working principles of various resistance current-limiting protection circuits 4 1

2.4.7 Pull-up resistor circuit and pull-down resistor circuit 4 1

2.4.8 Analysis and understanding of the working principle of other resistance circuits 42

2.5 potentiometer knowledge and typical application circuit 44

2.5. 1 potentiometer shape characteristics and circuit symbol identification information 44

2.5.2 Principle of adjusting potentiometer resistance and resistance characteristics of various potentiometers 46

2.5.3 Analyze and understand the working principle of the actual circuit of potentiometer 48

2.6 Basic knowledge of variable resistors 49

2.6. 1 Graphic information of variable resistor shape characteristics and circuit symbols 49

2.6.2 Structure and working principle of variable resistor 5 1

2.6.3 Analyze and understand the working principle of the actual variable resistance circuit 5 1

Chapter 3 The Important Characteristics of Capacitors and Capacitor Circuits and Resistor-Capacitor Circuits 54

3. 1 Symbols and important characteristics of common capacitor circuits 55

3. 1. 1 Circuit symbol and basic structure of capacitor 55

3. 1.2 charging and discharging characteristics of capacitor DC power supply 55

3. 1.3 Charge and discharge characteristics of capacitive AC power supply 57

3. AC characteristics of1.4 DC blocking capacitor 58

3. 1.5 Capacitance and reactance characteristics of capacitor 60

3. 1.6 The energy storage characteristics of the capacitor and the voltage across the capacitor cannot change suddenly. 6 1

3. 1.7 Symbol and structure of electrolytic capacitor circuit 6 1

3. 1.8 Important characteristics of electrolytic capacitors 63

3.2 Capacitor Series Circuit and Parallel Circuit and Important Features 64

3.2. 1 capacitor series circuit and its important characteristics 64

3.2.2 Capacitor Parallel Circuit and Its Important Characteristics 65

3.2.3 Parallel circuit and series circuit of polar electrolytic capacitor 67

3.3 Analysis and understanding of the working principle of pure capacitance circuit 69

3.3. 1 Analysis and understanding of the working principle of capacitive coupling circuit 69

3.3.2 Analyze and understand the working principle of capacitive voltage divider circuit 7 1

3.3.3 Analysis and Understanding of the Working Principle of Capacitance Filter Circuit 72

3.3.4 Analysis and Understanding of the Working Principle of Decoupling Capacitor Circuit 74

3.3.5 High frequency vibration cancellation capacitor circuit and radio wave interference cancellation capacitor circuit 76

3.3.6 Analysis and understanding of the working principle of loudspeaker capacitor frequency division circuit 77

3.3.7 Analysis and understanding of the working principle of the emitter bypass capacitor circuit 78

3.3.8 Analysis and understanding of the working principle of accelerating capacitor circuit 80

3.4 Analyze and understand the working principle of RC circuit 8 1

3.4. 1 RC series circuit characteristics 8 1

3.4.2 Characteristics of RC Parallel Circuit 82

3.4.3 Analysis and understanding of the working principle of RC de-emphasis circuit 83

3.4.4 Analyze and understand the working principle of the integrating circuit 84.

3.4.5 Analysis and understanding of working principle of differential circuit 86

3.4.6 Analysis and understanding of working principles of various RC circuits 87

Chapter 4 Important Characteristics and Practical Circuits of Inductors and Transformers 90

4. 1 Important characteristics and typical application circuits of inductors 9 1

4. 1. 1 inductor shape characteristics and circuit symbols 9 1

4. 1.2 Structure and working principle of sensor 92

4. 1.3 AC characteristics of inductance DC resistance 92

4. 1.4 Inductance characteristics of inductor 93

4. 1.5 Analysis and understanding of the working principle of inductance circuit 94

4.2 Important Characteristics and Typical Application Circuits of Ordinary Transformers 95

4.2. 1 transformer element shape feature identification and circuit symbol identification information 95

4.2.2 Structure and working principle of transformer 97

4.2.3 Transformer isolation characteristics 97

4.2.4 DC isolated AC characteristics of transformer 98

4.2.5 Transformation ratio and impedance characteristics of transformer 99

4.2.6 Analyze and understand the working principle of power transformer circuit 100.

4.2.7 Analysis and Understanding of Working Principles of Other Transformer Circuits 104

4.3 Important Characteristics of LC Resonant Circuit and Its Application Circuit 106

4.3. 1 LC free resonance process 106

4.3.2 Important characteristics of LC parallel resonant circuit 108

4.3.3 Analysis and understanding of the working principle of LC parallel resonant wave blocking circuit11/

4.3.4 Important characteristics of LC series resonant circuit 1 12

4.3.5 Analyze and understand the working principle of LC series resonant circuit 1 14.

Chapter 5 Important Characteristics of Diodes and Diode Circuits 1 16

5. 1 Important characteristics and application circuits of ordinary diodes 1 17

5. 1. 1 symbol information and basic working principle of diode circuit 1 17

5. 1.2 Forward and backward characteristics of diode 1 19

5./Other characteristics of kloc-0/.3 diode 120

5. 1.4 Analysis and understanding of the working principle of diode half-wave rectifier circuit 12 1

5. 1.5 Analysis and understanding of working principle of full-wave rectifier circuit

5. Analysis and Understanding of the Working Principle of1.6 Bridge Rectifier Circuit 125

Analysis and understanding of the working principle of the rectifier circuit composed of 5. 1.7 bridge stack 127.

5. 1.8 Analysis and understanding of the working principle of voltage doubler rectifier circuit 129

5. 1.9 Analysis and summary of four rectifier circuits 13 1

5.2 Analysis and understanding of working principle of other diode application circuits 132

Operation principle analysis and understanding of1diode simple DC voltage-stabilizing circuit119886.19888888888883

5.2.2 Analyze and understand the working principle of diode temperature compensation circuit 133.

5.2.3 Analyze and understand the working principle of diode control circuit 135.

5.2.4 Analysis and Understanding of the Working Principle of Diode Limiting Circuit 136

5.2.5 diode switch circuit and fault handling 138

5.2.6 Analyze and understand the working principle of diode detection circuit 140.

5.2.7 Analysis and understanding of the working principle of diode protection circuit in relay drive circuit 142

5.3 Important Characteristics and Practical Circuits of Zener Diodes 143

5.3. 1 zener diode shape characteristics and circuit symbols 143

5.3.2 Structure and working principle of Zener diode 143

5.3.3 Important Characteristics and Typical Application Circuits of Zener Diode 144

5.4 Important characteristics and typical application circuits of light-emitting diodes and varactors 145

5.4.1Important characteristics and typical application circuits of LED 145

5.4.2 Important characteristics and typical application circuits of varactor diode 147

Chapter VI Important characteristics and typical application circuits of triode 149.

6. Basic working principle of1triode 150

6. 1. 1 triode shape characteristics and circuit symbol diagram information 150

6. Structure and working principle of1.2 triode 15 1

6. Three working states of1.3 transistor: off, amplification and saturation 153.

6. 1.4 triode 155 voltage-current relationship of each electrode

6.2 Functions and Important Features of Triode Circuit 156

6.2. Functions of1triode circuit 156

6.2.2 Characteristics of transistor current amplification, control and emitter voltage after base voltage 157

6.2.3 Controllable internal resistance and switching characteristics between collector and emitter of triode 158

6.2.4 Triode input circuit and output circuit 159

6.3 Analyze and understand the working principle of triode DC bias circuit 160.

6.3. 1 transistor circuit analysis method 160

6.3.2 Analysis method of base bias circuit and the function and influence of transistor static current 162

6.3.3 Analyze and understand the working principles of four fixed bias circuits of triode 164.

6.3.4 Analyze and understand the working principles of seven kinds of voltage-dividing bias circuits of triode 167.

6.3.5 Analyze and understand the working principles of four kinds of collector-base negative feedback triode bias circuits 55438+070.

6.4 triode collector DC circuit and emitter DC circuit 17 1

6.4. 1 Analyze and understand the working principles of seven kinds of triode collector DC circuits +07 1

6.4.2 analyze and understand the working principles of DC circuits of seven kinds of triode emitters/kloc-0 /40666.6666666666666

6.5 Analysis and Understanding of the Working Principle of Triode * * Emitter Single-stage Amplifier Circuit 176

6.5. 1 Signal transmission and processing flow of transmitter amplifier 177

6. 5. 2 * * * Functions of components in emitter amplifier 177

6.5.3 *** Important Features of Emitter Amplifier 180

6.6 Analyze and understand the working principle of triode * * collector amplifier circuit 182.

6.6.1* * DC circuit and AC circuit of collector single-stage amplifier 182

6.6.2 emitter resistance 182 principle of converting current change into voltage change

6.6.3 *** Important Features of Collector Amplifier 183

6.6.4 *** Collector amplifier circuit analysis summary 184

6.7 *** Analysis and Understanding of the Working Principle of Base Amplifier Circuit 185

6.7. Working principle of DC circuit of1* * base amplifier 185

6.7.2 * * Base Amplifier 186 AC Circuit and Component Analysis

6.7.3 *** Important Features of Basic Amplifier 186

6.7.4 *** Analysis and Summary of Basic Amplifier Circuits and Three Kinds of Amplifier Application Circuits 187