Question: A circuit that will allow you to estimate the threshold voltage, VTN,

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Question:

A circuit that will allow you to estimate the threshold voltage, VTN, is shown in Figure 1. What region of operation is the MOSFET in? What measurement would you make to estimate the threshold voltage? (Hint: R1 limits the drain current to a value at which the MOSFET is conducting a tiny amount of current, i.e. it has just barely started to conduct.) Figure 1 Once the threshold is known, you could estimate Kn using the circuit of Figure 2. Figure 2 How does this circuit work and what measurements would you make? (Hint: why is it different from Figure 1 ?)(Another hint: The operating region is the same as the circuit in Figure 1 and we are now conducting considerable current.)(Another hint: use ohm's law, not an ammeter.)

Explanation / Answer

1.87

2.016

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