ee348_Experiment02 - Laboratory Experiment 2 EE348L...

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University of Southern California. EE348L page1 Lab 2 Laboratory Experiment 2 EE348L B.Madhavan Revised by: Aaron Curry
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University of Southern California. EE348L page2 Lab 2 Table of Contents 2 Experiment #2: SPICE Simulations-II ............................................................... 4 2.1 Introduction ......................................................................................................................... 4 2.2 Good SPICE netlist writing practice .................................................................................. 4 2.2.1 Options statements ................................................................................................. 5 2.3 Voltage Controlled Voltage Sources (VCVS) .................................................................... 5 2.3.1 Examples of VCVS statements: ............................................................................. 6 2.3.2 Subcircuit representation: ...................................................................................... 8 2.3.3 Parameter sweep in transient analysis ................................................................... 10 2.3.4 .ALTER Statements ............................................................................................... 11 2.3.5 Using the PAR expression ..................................................................................... 12 2.3.5.1 Plotting the transfer function …………………………………………….13 2.3.5.2 Plotting the phase of the transfer function ………………………………...13 2.3.5.3 Printing from HSPICE ……………………………………………………15 2.4 Voltage Controlled Voltage Sources (VCCS) .................................................................... 15 2.4.1 Examples of VCCS statements ............................................................................. 15 2.5 Current Controlled Current Sources (CCCS) ..................................................................... 16 2.5.1 Examples of CCCS statements .............................................................................. 16 2.6 Voltage Controlled Current Sources (CCVS) ..................................................................... 17 2.6.1 Examples of CCVS statements .............................................................................. 17 2.7 References ........................................................................................................................... 18 2.8 Lab Exercises ....................................................................................................................... 19 2.9 General Report Format Guidelines ...................................................................................... 25
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University of Southern California. EE348L page3 Lab 2 Table of Figures Figure 2-1: ( a) VCVS conceptual representation of op-amp, (b) schematic representation. ................. 7 Figure 2-2: Behavior of op-amp output voltage, assuming power supply = ±12V. ................................ 7 Figure 2-3: Idealized small-signal model of op-amp in Exercise 2 of lab assignment #1.. .................... 8 Figure 2-4: Op-amp circuit in Exercise 2 of lab assignment #1 .............................................................. 9 Figure 2-5: SPICE netlist for op-amp circuit in Exercise 2 of lab assignment #1 ................................ 10 Figure 2-6: SPICE netlist for op-amp circuit in Exercise 2 of lab assignment #1 with .ALTER statements………………………………………………………………………………………………..……..….. 12 Figure 2-7: First-order RC Low-Pass Filter. ......................................................................................... 13 Figure 2-8: SPICE netlist highlighting ac analysis with parameter variation and user-defined expression ............................................................................................................................................. 14 Figure 2-9: Tuned circuit for VCCS problem 5 ...................................................................................... 19 Figure 2-10: A regular 741 op-amp. ...................................................................................................... 20 Figure 2-11: Equivalent circuit model of an op-amp .............................................................................. 20 Figure 2-12: Tuned circuit for VCCS problem 5. Zin(s) is the input impedance of the entire circuit to the right of the arrow …………………………………………………………. .................................................... 21 Figure 2-13: A switched capacitor amplifier for problem 6. ................................................................. 23 Figure 2-14: Timing diagram for the switched capacitor circuit in problem 6. ...................................... 24 Figure 2-15: Switched capacitor circuit during phase Φ 1. ...................................................................... 24 Figure 2-16: Switched capacitor circuit during phase Φ 2. ...................................................................... 24
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University of Southern California. EE348L page4 Lab 2 2 Experiment #2: SPICE Simulations Part II 2.1 Introduction: The objective of this laboratory assignment is to familiarize the student with: 1. Good netlist writing practice. A netlist is a text file that contains a description of the circuit, including all the sources in the circuit, the type of analysis (ac, dc, transient, noise etc.), simulator control options to obtain a reasonable simulation of the circuit under consideration. A netlist is generated by hand using a text editor in this course.
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