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🔺 Interactive MOSFET I-V Curve Analysis

Interactive 3D MOSFET model where adjusting gate-source and drain-source voltage sliders traces the current-voltage curve through the transistor's cutoff, triode and saturation regions.

Physics & Mechanics3DModerate60 FPS

A 3D cutaway of an n-channel MOSFET shows the inversion channel forming, thinning toward pinch-off, and the electron flow that follows — while a live current-voltage graph traces the transistor through cutoff, triode, and saturation.

🔬 What It Demonstrates

How gate-source voltage sets the channel's inversion charge, how drain-source voltage drives current through it, and how those two voltages together define which of the three MOSFET operating regions the device sits in.

🎮 How to Use

Drag the V_GS, V_DS, and V_th sliders and watch the channel, depletion wedge, and electron flow respond in the 3D model, or press Auto-sweep to trace the full I-V curve automatically.

💡 Did You Know?

The same square-law I-V equations used here, formalized in the 1960s, still describe the basic switching behaviour of the tens of billions of MOSFETs packed into a modern CPU die.

⚙ Under the hood

Manipulate gate voltage and drain voltage sliders to visualize the current-voltage relationship of a MOSFET, observing its characteristics in various operating regions. Adjust parameters to see how they affect the curve.

mosfetiv-characteristicstransistorssemiconductor-physicselectronicsphysics

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install