Circuit designers use circuit simulation packages to determine the operation of a circuit. These packages allow testing of various designs without having to buy the hardware or physically build the circuit, thereby saving time and money. Of course, the results from a circuit simulation package are only as accurate as the device models that are used in the package.

This lab is an introduction to a particular package called SPICE (Simulation Program with Integrated Circuits Emphasis). In particular, we will use PSpice, which is a version of SPICE that runs on PCs.

The following online PSpice references are available to help you get started:

• Tutorial from Bucknell's ELEC 463, 2006
• PSpice with Capture references from UPenn (see "Quick Reference Guide" and "Tutorial"):
  http://www.seas.upenn.edu/~jan/spice/spice.overview.html
• Tutorial from University of Glasgow:
  http://userweb.elec.gla.ac.uk/j/jdavies/orcad/spiceintro.pdf

Please do the following activities.

1. Simulate the two circuits that are written on the board in the lab (a voltage divider and an op amp circuit).
   • For the voltage divider, perform a "Bias Point" analysis. Be sure to enable Bias Points before the simulation. Use PSpice to find the power of all elements.
   • For the op amp circuit, perform a "DC Sweep" analysis (with a DC voltage source) and a "Time Domain" analysis with a sinusoidal voltage source (VSIN). Do you see the saturation of the op amp?

2. Challenge: (Please try this if you have time, and this problem is part of Homework 2.)
   Please solve Problem 2.31 in the text using PSpice and find the current i_delta, the voltage v_o, and the power of each element in the circuit. We analyzed this problem in class on Wednesday, Sept. 2.

   Dependent sources are indicated in PSpice with the symbols E, F, G, and H (in the ANALOG library), corresponding to the cases in Figure 2.2 of our textbook. An example of PSpice with dependent sources is available at
   http://www.tcc.edu/faculty/webpages/PGordy/Orcad/Depend.pdf You will need sources F and H for this problem.

Thank you.