Lab Day 2

Resistors and Ohms Law - Voltage-Current Characteristics Lab 

In this lab, we measured several combinations of voltage and current for a resistor and plot the resulting voltage-current characteristic curve measured for the resistor. The slope of the curve will be estimated using linear regression techniques.





1. This is the circuit diagram.














2. The measured resistance value of resistor was 100 ohms. The table shows the measured voltage and current over the range of 0V-2V.































3. This is the graph with the data of voltage and current. The equation of the line is given: y=mx+b and on this graph it is I=9.0395V+0.0395 and the slope of the line is 9.0395.

Dependent Sources and MOSFETs Lab

In this lab assignment, a qualitative discussion of dependent sources is presented in the context of MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). A simple voltage controlled current source is constructed and tested. We built and tested a circuit which acts as a Voltage Controlled Current Source (VCCS).

 1. Circuit diagram.

2. Picture of our circuit.

3. Table providing the measured voltage and current.

4. Graph of the measured voltage and current. When the voltage is below 2V, the current increases very slowly and when the voltage is greater than 2.5V, the current also increases very slowly. The current increases rapidly when the voltage is 2.1V which is also called the threshold voltage.

5. The dependent source behaves as a voltage controlled current source (VCCS) because the current at one location in the circuit is controlled by the voltage at another location in the circuit.

6. The estimated value of g for circuit is the slope of the line which is 39.534.