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| 1. Set up. |
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| 2. Set up. |
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| 3. Set up. |
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| 4. Set up. |
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| Data collected |
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| Data |
Summary: In this lab, we measured Gate- to source voltage a MOSFET(metal–oxide–semiconductor field-effect transistor) needed to conduct current. We looked for the threshold voltage and how drain current is changing depend on changing in voltage. The MOSFET started transmitting current when Voltage hit 0.5 volt, so it is threshold voltage. Looking at the graph, from 0.6 volt to maximum current 0.8 volt, the graph is concave upward for first half and downward for last half. As we have learned, This is VCCS(a voltage-controlled current source) because it controls current with voltage. Using data, we came up with best-fit line/regression line and its equation is y=220.29x-140.15. As the lab manual have said, "The parameter g of a VCCS provides a relationship between the rate of change between the applied voltage and the resulting current. This is essentially the slope of the data you plotted in part 3 above", therefore, the g is 220.29 and maybe unit of mA per Volt. At the end of this make-up lab, I asked Prof. Mason if our data was right, but it was wrong. It is just like life, you did something wrong you thought you did it right. (tragic)
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