HEMT Drain Current Calculator and Formula

This page provides a HEMT (High Electron Mobility Transistor) drain current calculator and explains the HEMT drain current formula.

HEMT Drain Current Formula

Here’s the formula used to calculate the drain current:

Where:

• Ids = HEMT Drain Current
• q = Electron charge = 1.6 x 10^-19 Coulombs
• n(z) = Concentration of two-dimensional electron gas (electrons/m²)
• W = Gate Width (meters)
• v(z) = Electron velocity (m/s)

Example Calculation

Let’s say we have the following inputs:

• N(z) = 5.21E15 (5.21 x 10¹⁵ electrons/m²)
• W = 150 µm (150 x 10^-6 meters)
• V(z) = 2E5 (2 x 10⁵ m/s)

Using the formula, the calculated drain current (Ids) would be approximately 25 mA.