MESFET Pinch-Off Voltage Calculator
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This page provides information about the MESFET pinch-off voltage calculator and the formula used in its calculations.
Pinch-Off Voltage Formula
The following formula is used to calculate the pinch-off voltage for a MESFET:
Where:
- Vp = Pinch-off voltage (in volts)
- q = Charge of an electron (1.6 x 10-19 coulombs)
- Nd = Electron concentration (in electrons per cm-3)
- a = Channel height (in meters)
- εs = Permittivity of the semiconductor material (in Farads/meter), calculated as εr * ε0
- ε0 = Permittivity of free space (8.854 x 10-12 F/m)
- εr = Relative dielectric constant
Pinch-Off Voltage Calculator and Example
Let’s look at an example:
INPUTS:
- Nd = 8E17 cm-3
- a = 0.1 µm (0.1 x 10-6 m)
- Er = 13.10
OUTPUTS:
- Vp = 5.517 volts