ETEE3153
Experiment #4
Submitted: September 5, 2005
By, David Scott
Lab partner: Blake Griffin
Prof. Jack Carter
Submitted: 10/27/2005
Microsoft Word
OrCAD Pspice student version 9.1
Main Body The purpose of this laboratory experiment is to learn simple techniques for analyzing a circuit with a nonlinear element. It gives details as to what methods to uses when using nonlinear elements. This experiment will give us a way to get the characteristics of the circuit through simulation and actual lab measurements. The lab begins with describing that most our time in network analysis deal with linear circuit. In order to analyze the circuit, we have to know the characteristic of the nonlinear element and the characteristic of the circuit at the points where nonlinear elements are connected. The characteristics of a device are described as voltage vs. current. The devise must be experimentally determined by either the manufacturer or determined experimentally by a user. The characteristic of a resistor is a straight line, because voltage and current are proportional, through Ohms Law (V=IR or R=V/I). This equation shows that the slope is the value of the resistance which intercept at zero (line that passes through the origin). This information, along with a visual representation of it, is shown in the lab book with the visual representation shown in Graph 1 (Ambrose 4-1): The DC characteristic of a network at two terminals is a DC load line which is a straight line in linear networks. The equation for the DC load line can be determined from two experimentally or calculated points. The two points are the open circuit voltage point (0, Voc) and the shout circuit current (Isc, 0) point. This information, along with a visual representation of it, is shown in the lab book with the visual representation shown in Graph 2 (Ambrose 4-2): Once