SPICE-Simulation using LTspice IV

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3.6. Changing Current or Voltage Ranges Very often you want to examine little details of a curve. So you have 2 possibilities: a) Use the discussed zoom function from chapter 3.4. b) Switch from “Autorange“ to „Manual Limits“. Example for solution a): Task: Show only the short negative „peak“ of the collector voltage by zooming: ---------------------------------------------------- Example for Solution b): Task: Set the values fort he vertical axis to the range 0…..+1.5V. Step 1: RIGHT click on the calibration of the vertical axis in the diagram and you get this menu for Manual Setting on BOTH AXIES. (Attention: If you left click on the axis scaling, you’ll only see the „quick solution menu”. Please test this, but we want to have a look on the „big solution” and continue with the case of the right mouseclick). Now switch off “Autoranging” and activate „Manual Limits“ . 12
Step 2: Enter the new border values for the vertical axis. If you want you can also modify the horizontal time axis. But at this moment: let it be... This is the goal when returning to the full screen presentation including the schematic, where you now -- if you want! -- can modify part values. ---------------------------------------------------------------------------------------------------------------------------------------------------- 13
Page 1 and 2: SPICE-Simulation using LTspice IV T
Page 3 and 4: 8. Project 4: U-I-Curves of Parts 4
Page 5 and 6: 1. Introduction Modern electronics
Page 7 and 8: 3.2. Presentation of Simulation Res
Page 9 and 10: 3.4. Changing Curve Colours A very
Page 11: Task: Make the voltage curve visibl
Page 15 and 16: 3.7. Differential Measurements Ever
Page 17 and 18: 3.9. Changing Part Values Now we wa
Page 19 and 20: 4.2. Changing Part Values This is d
Page 21 and 22: Now start the simulation, click on
Page 23 and 24: 4.3.3. The Impulse Response Fourier
Page 25 and 26: This is the correct presentation: -
Page 27 and 28: 4.4.2. Square Wave (f = 1691 Hz) St
Page 29 and 30: 4.5. Frequency Domain Simulation: A
Page 31 and 32: 5. FFT (= Fast Fourier Transformati
Page 33 and 34: Select Input Voltage V(n001) by a m
Page 35 and 36: 6.2. Important: creating SPICE Mode
Page 37 and 38: 6.2.2. Creation of the Symbol for a
Page 39 and 40: For an ideal transformer you can re
Page 41 and 42: Step 5: self-explainig…. 41
Page 43 and 44: -----------------------------------
Page 45 and 46: When simulating for 200ms, you will
Page 47 and 48: 8. Project 4: V-I-Curves of Parts 8
Page 49 and 50: 8.3. NPN Transistor In the „examp
Page 51 and 52: 8.4. N-Channel Junction FET First w
Page 53 and 54: In the simulation we would like to
Page 55 and 56: 9.2. Two Stage Broadband Amplifier
Page 57 and 58: 9.2.4. DC Bias If you want to know
Page 59 and 60: 9.2.5. Frequency Domain Simulation:
Page 61 and 62: You will see this result and that a
Page 63 and 64:
Using the cursor you will find the
Page 65 and 66:
Let us now draw the complete circui
Page 67 and 68:
10.3. Use of Labels In general OP A
Page 69 and 70:
11. Project 7: DC-DC Converters Fir
Page 71 and 72:
11.2. The Step Up Converter The sch
Page 73 and 74:
If you want: vary the gate voltage,
Page 75 and 76:
11.4. The Step Down Converter In th
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SPICE-Simulation using LTspice IV

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