paraphrase

In the laboratory, the students will expand on the prelab by developing a biasing circuit, and adding a signal source to the circuit to create a MOSFET Amplifier. In order to design the biasing circuit, they will have to again find the experimental values of Vtn and kn, while also calculating the values of Rs, Rd, Rg1, and Rg2. In the last portions of the lab, students will investigate the result of bypassing the source resistor with a capacitor.

Introduction

Laboratory 4 will be used as an opportunity to investigate the N-Channel MOSFET and apply the transistor as an amplifier. The procedure is designed to allow students to familiarize themselves with MOSFET characteristics. The prelab is designed to introduce the MOSFET, but is also necessary in preparing the students for the actual laboratory. Much of the calculations used for the prelab simulations will carry over into the laboratory. Successful completion of the prelab is necessary for speedy work in the classroom laboratory.

The actual laboratory will develop on the sections completed in the prelab. Students will be required to understand MOSFET quiescent points, designing a biasing circuit, and finally construct a MOSFET amplifier. The laboratory will investigate the MOSFET amplifier and how its output is effected by bypassing the source resistor with a capacitor.

In the following report there will be three main sections presented: Theoretical Calculations, Experimental Results, and a Conclusion. In the theoretical calculations section, the Multisim screen captures of each prescribed circuit will be presented. Included in this section will be a circuit diagram and a short explanation of the circuit’s output. This section will be a useful tool for examining the experimental results. In the next section ─experimental results─ the laboratory screen shots from the oscilloscope will be presented. This is the main part of the laboratory: calculating the design parameters, building the prescribed circuits physically in lab and then collecting oscilloscope screen shots of the prescribed inputs and outputs of each circuit. Finally, in the conclusion section of this report, a summary of the experiment will be presented. Included in this summary will be rationale of the learning objectives.