SPICE-Simulation using LTspice IV

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3.8. Current Measurements Make the circuit diagram window active (...by a left mouseclick on it....) and move the cursor exactly over the part of which you want to know the current. The cursor changes to a “current sensor” and with a left mouseclick on the part you see the current curve. Example: Current in resistor R1 (= Collector resistor of the left transistor): ---------------------------------------------------------------------------------------------------------------------------------------- 16
3.9. Changing Part Values Now we want to repeat the simulation with different part values. Let every capacitor be C = 1000pF and the both base resistors of the transistors R3 = R4 = 22kΩ. Move at every part the cursor exactly on its value indication and right click with the mouse. So you get the property menu and you can modify the value. Close with OK. This is the new circuit to be simulated…. ….and this should be the simulation result: Please use the zoom function or modify the simulation time to see the details or to measure the new oscillation frequency. ------------------------------------------------------------------------------------------------------------------------------------------ 17
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 and 12: Task: Make the voltage curve visibl
Page 13 and 14: Step 2: Enter the new border values
Page 15: 3.7. Differential Measurements Ever
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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