Digital Applications of MOSFETs

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ZBBA1

Engineering

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SEE ATTACHED PAPER FOR CIRCUITS


For each circuit given below perform a hand calculation and simulate the circuit.

Figure 1: NMOS Resistive load Figure 2: PMOS Resistive load

Given a pulse of 0 to 2.5 volts for 𝑉2; calculate the current 𝐼𝐷 flowing through each device using the (W/L) ratio and the 𝑉𝑇𝑂 for the transistor from the datasheet. State the mode of operation at each voltage level and plot the result using LTSpice.

Calculate 𝑉𝐺𝑆 π‘Žπ‘›π‘‘ π‘‰π‘œπ‘£
Measure the current 𝐼𝐷, 𝑉𝐺𝑆 π‘Žπ‘›π‘‘ π‘‰π‘œπ‘£ at each voltage in the pulse.

Compare the results from the hand calculation, simulation, and measurement. Clearly explain and similarities and differences with the results. If there are differences with the results that are very large, give an explanation base on what you know about the device explaining why this occur.

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Digital Applications of MOSFETS Metal Oxide Semiconductor Field Effect Transistor (MOSFET) are extremely useful in power amplifiers and high-speed switching application. In this lab student will be able to get an understanding of MOSFET and its use in switching application, For each circuit given below perform a hand calculation and simulate the circuit, 5 V1 V1 R1 1k 5 M1 NMOS M1 PMOS V2 V2 R1 1k Figure 1: NMOS Resistive load Figure 2: PMOS Resistive load Given a pulse of 0 to 2.5 volts for V, calculate the current I, flowing through each device using the (W/L) ratio and the Vro for the transistor from the datasheet. State the mode of operation at each voltage level and plot the result using LTSpice. Calculate Vos and Vov Measure the current lo, Ves and Voy at each voltage in the pulse. Compare the results from the hand calculation, simulation, and measurement. Clearly explain and similarities and differences with the results. If there are differences with the results that are very large, give an explanation base on what you know about the device explaining why this occur.
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Explanation & Answer

Hey, as I promised, I tried to be the fastest I could. Please let me know if you need anything else. :D

NMOS

Plot of ID as function of VGS

As we can see for values under 1.7 volts, the current is zero. This is the cutoff region.
The linear region is between 1.7 and 2 volts, cur...


Anonymous
I was struggling with this subject, and this helped me a ton!

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