MOSFET Subthreshold Slope Calculator
Compute the MOSFET subthreshold swing in millivolts per decade of drain current.
Description
Compute the MOSFET subthreshold swing in millivolts per decade of drain current.
MOSFET Subthreshold Slope Calculator is a focused tool for the following task. Compute the MOSFET subthreshold swing in millivolts per decade of drain current. It reports Subthreshold slope from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use MOSFET Subthreshold Slope
Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.
- Cd/Cox
- Required number. Ratio of the depletion capacitance to the gate oxide capacitance (Cd/Cox).
- Temperature (K)
- Optional number in K. Device temperature.
The cited overview of MOSFET supplies background for the terminology and domain context used by this tool.1
How MOSFET Subthreshold Slope works
Compute the MOSFET subthreshold swing in millivolts per decade of drain current. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- Subthreshold slope (mV/dec)
- Returned number in mV/dec. Subthreshold swing in millivolts per decade.
Limitations and assumptions
- Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
- Cd/Cox must be at least 0.
- Temperature must be at least 5e-324.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.
References
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MOSFET — Wikipedia contributors
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