SPICE-Simulation using LTspice IV

Contents
Page
1. Introduction 5
2. Installation 5
3. Exercises with the included Example „Astable Multivibrator“ 5
3.1. Using Schematic and Simulation 5
3.2. Presentation of Simulation Results 7
3.3. Deleting Curves 8
3.4. Changing Curve Colours 9
3.5. Changing the Simulation Time 10
3.6. Changing Current- or Voltage Ranges 12
3.7. Using Cursors 14
3.7.1. Working with one Cursor 14
3.7.2. Working with two Cursors 14
3.7. Differential Measurements 15
3.8. Current Measurements 16
3.9. Changing Part Values 17
4. Project 1: RC Lowpass Filter 18
4.1. Drawing the Circuit Diagram with the Editor 18
4.2. Changing Part Values 19
4.3. Time Domain Simulation: non-repetitive Signals at the Input 20
4.3.1. Step Response 20
4.3.2. Switching ON and OFF 22
4.3.3. Impulse Response 23
4.4. Time Domain Simulation: using Periodic Signals at the Input 26
4.4.1. Sine Wave (f = 1591 Hz) 26
4.4.2. Square Wave (f = 1591 Hz) 27
4.4.3. Triangle Wave (f = 1591 Hz) 28
4.5. Frequency Domain simulation: AC Sweep 29
5. FFT (= Fast Fourier Transform) 31
6. Project 2: Rectifiers 34
6.1. Simple Rectifier without Transformer 34
6.2. Important: creating SPICE Model and Symbol for a Transformer 35
6.2.1. The easiest Solution: a simple ideal Transformer 35
6.2.2. Creation of the SPICE Model for a real Two Windings Transformer 35
6.2.3. Creation of the Symbol for a Two Windings Transformer 35
6.3. One Pulse Rectifier with Transformer 38
6.4. Rectifier with Diode „1N4007“ 40
6.5. Two Pulse Rectifier with Transformer 42
7. Project 3: Three Phase AC-system 44
7.1. Schematic and Simulation 44
7.2. Rectifier Bridge for Three Phase AC Systems (= dynamo in a modern car or
motorcycle) 45
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