ECE Undergraduate Laboratories
ECE 291 - Electrical Engineering Laboratory

CIRCUIT SIMULATION

The powerful program PSPICE solves very quickly complex circuit equations for various signals and conditions and also displays results graphically.  The best way to learn it is by trying to simulate some of the circuits explored in this laboratory.  Comparison of simulations with your measurements will, hopefully, give you a better insight in the operation of these circuits.  Remember however that while simulations are very useful, they are never a substitute for real data taken from real physical systems, which are the true realm of engineering activity. 

The objective of using PSPICE in this course is to give you an opportunity of comparison  the results of simulation with the real data obtained in the laboratory.  You should use PSPICE schematics with the actual values of the  components in your circuits.  For example, use the values of resistances measured by an ohmmeter rather than those given by the resistor color code. When comparing simulation curves (such as frequency responses of RC or RLC circuits) with experimental data, plot them on the same graph.  To do this, you need to export simulation curves to a graphing program, such as EXCEL or MATLAB, in which numbers from simulations and experiments can be put in different columns. Use discrete points for experimental data and continuous curves for simulations.

Copying simulation curves from PSPICE to EXCEL

Adding experimental data to the plot

 Copying simulation plot (image) from PSPICE to WORD

Copying schematics from PSPICE to WORD