-The MOSFET in Figure has the following specifications: IDon) = 10 mA @ VGSon) = 10 V and VGSTh) = 2 V. Determine the value of VGS for this circuit.

Question

-The MOSFET in Figure  has the following specifications: IDon) = 10 mA @ VGSon) = 10 V and VGSTh) = 2 V. Determine the value of VGS for this circuit.

Quizplus · Accepted Answer

The MOSFET operates in the saturation region when $V_{GS} > V_{GSTh}$. Given $I_{Don} = 10 mA$ at $V_{GSon} = 10 V$, and $V_{GSTh} = 2 V$, the value of $V_{GS}$ can be found using the square law model for MOSFETs in saturation: $I_D = I_{Don} \left( \frac{V_{GS} - V_{GSTh}}{V_{GSon} - V_{GSTh}} \right)^2$. However, without the current $I_D$ specified for the calculation, and based on the information provided, it's not directly solvable. The question seems to aim at understanding the relationship between $V_{GS}$, $V_{GSTh}$, and $V_{GSon}$ rather than calculating using the formula. Given the options and the typical operation point, $V_{GS}$ would ideally be $V_{GSon}$ for $I_{Don}$, but since that's not an option and without further context or calculation details, the question might be misunderstood or missing information. Normally, $V_{GS}$ needs to be greater than $V_{GSTh}$ for the MOSFET to conduct, and the given options don't directly relate to the provided specifications for a clear calculation. Thus, without a clear path to calculate $V_{GS}$ from the given information, and assuming a misunderstanding in the explanation, the correct choice is not directly derivable from the provided data.

-The MOSFET in Figure Has the Following Specifications: IDon)