NMOS Saturation I-V & Transconductance Calculator

NMOS Saturation I–V & Transconductance Calculator

Calculate the drain current \(I_D\) and transconductance \(g_m\) of an NMOS in saturation mode.

* Ensure that \(V_{GS} > V_{TN}\) and \(V_{DS} > V_{GS} – V_{TN}\).

Step 1: Enter NMOS Parameters

e.g., 2.5 V

e.g., 1 V

e.g., 2 V (must be > \(V_{GS}-V_{TN}\))

e.g., 0.001 A/V²

Dimensionless (e.g., 10)

Drain Current (Saturation): $$ I_D = \frac{1}{2}\, k_n \frac{W}{L} \left(V_{GS} – V_{TN}\right)^2 $$

Transconductance: $$ g_m = k_n \frac{W}{L} \left(V_{GS} – V_{TN}\right) $$