SPICE, developed with the support of the National Science Foundation by students and faculty at the University of California at Berkeley, is a program that has become the de facto standard for analog circuit simulation. SPICE’s success is due to a combination of virtues: the program is powerful, easy to operate, and inexpensive, is supported on most computers of engineering significance, and is well maintained. But SPICE will do what is needed for our purposes and is more widely and inexpensively available than other choices.