Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Threshold at zero body bias (V)

Required number input.

Body coefficient (√V)

Required number input.

Twice Fermi potential (V)

Required number input.

Source-to-body bias (V)

Required number input.

Estimate nMOS threshold with body effect from zero-body-bias threshold, body coefficient, surface potential, and nonnegative source-to-body bias. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Body-biased threshold (V)

The resulting body-biased threshold returned as a number.

• MOSFET threshold voltage is not a recommended fully-on gate voltage. Conduction and switching loss depend on gate drive, charge plateaus, current, drain voltage, switching speed, temperature, package parasitics, reverse recovery, dead time, and thermal conditions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

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