// multi-utility computation suite · offline · instant · precise
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sci.mosfet-threshold-voltage Calculator
Calculates MOSFET threshold voltage V_th = φ_MS − Qox/Cox + 2φ_F + √(4εsqNφ_F)/Cox and shift from body bias effect. V_th decreases with temperature (−2 mV/°C) — this causes increased leakage current at elevated temperature in digital circuits.
Inputs
Phi F V
Reference formula or conversion factor shown for context.
Oxide Thickness Nm
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
Depletion Charge Cm2
Reference formula or conversion factor shown for context.
Flat Band Voltage V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Results
threshold voltage Vth (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
oxide capacitance Cox (F/m²)
Sample size or count used in the calculation.
2φF (V)
Reference formula or conversion factor shown for context.
Vth = VFB + 2φF - Qd/Cox
Reference formula or conversion factor shown for context.