8/31/17 Dependent Sources and MOSFETs

Dependent Sources and MOSFETs

Date 8/31/17

Overview 

Gain an understanding of transistors by using variable voltage inputs to see how a MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) works. MOSFET'S come in n-channel and p-channel, we will be using a ZVN2210A n-channel MOSFET. The three terminals of the device are called the source (S), the drain (D) and the gate (G).

Lab Procedures:

Circuit Diagram from Lab Procedure

1) Make a circuit as shown in the figure below. Connect variable voltage source and a volt meter to the G terminal of the MOSFET, with the d terminal toward the 100 resistor. and s terminal toward ground node.

2) Starting from 0 volts, apply voltage until there's a current reading in the second Digital Multimeter which is set up in Amps. Record value when current records a value and increase in intervals of 0.3 volts and run intervals up to 5 volts. 

3) Plot data

4)  Using slope from data, estimate value g. 

RESULTS : 

MOSFET CIRCUIT

Data table of Data collected

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Graph of Data

Slope of data 

Value of g = 51(mA/V) based on slope from graph above 

This lab we did within our first 2 weeks of class. My group was unsuccessful and I decided to re-due this lab correctly from home. I tried looking for this Mosfet at a electronic store with no luck, and later realized Mosfets are the same as a transistor with the same n-channel and p-channel types. My personal voltmeter gave zeros when I tried redoing this lab and only got 0's for current at all voltage levels, when I realized my Amp meter within my DMM is not working. 

This lab, once done correctly was cool to see how transistors require a certain amount of energy to work and caps out within a range specific to each transistor. 

8/29/17 Solderless Breadboards, Open-Circuit & Short-Circuit

Solderless Breadboards, Open-Circuits and Short-Circuits 

Date: 8/29/17 

Overview 

This lab will give an understanding of breadboards and measuring resistance using a Digital Multi Meter (DMM). 

Lab Procedure 

1) Use a DMM in two holes in the same row on the beard board and record resistance as in the figure. 

2) Check resistance of two separate rows using the DMM. Record results. 

3) Check two different rows of breadboard between Node A and Node C. Record results 

4) Use a jumper wire (simply a wire) to connect two different nodes, use DMM at each node. Record Results. 

Observation 

1) Lab procedure 1 is the result of a short circuit resulting in a low DMM reading of 0.4 Ω.

2) Lab procedure 2 is an open circuit resulting in a very high or infinite DMM reading of " 1 " meaning infinite value. When turning the "Ω." dial from 200Ω to 2000kΩ, reading continues to be "1", an open circuit. 

3) Lab procedure 3 resulted in the same results of lab procedure 2, resulting in a open circuit with a DMM reading of "1."

4) Lab procedure 4 resulted in the same results as lab procedure 1, resulting in a closed circuit with a reading of 0.5 Ω.