Pinch off Voltage of FET Calculator

✖Pinch OFF Drain to Source Voltage in a JFET is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel, preventing any further current flow.ⓘ Pinch OFF Drain to Source Voltage [V_off(d-s)]			+10% -10%
✖Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage.ⓘ Gain to Source Voltage [V_(g-s)]			+10% -10%

✖Pinch OFF Voltage is the voltage at which the channel of a field-effect transistor (FET) becomes so narrow that it effectively closes, preventing any further current flow.ⓘ Pinch off Voltage of FET [V_off]

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Formula

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Pinch off Voltage of FET

Formula

`"V"_{"off"} = "V"_{"off(d-s)"}-"V"_{"(g-s)"}`

Example

`"68.1561V"="68.16V"-"0.0039V"`

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Pinch off Voltage of FET Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage
V_off = V_off(d-s)-V_(g-s)
This formula uses 3 Variables

Variables Used

Pinch OFF Voltage - (Measured in Volt) - Pinch OFF Voltage is the voltage at which the channel of a field-effect transistor (FET) becomes so narrow that it effectively closes, preventing any further current flow.
Pinch OFF Drain to Source Voltage - (Measured in Volt) - Pinch OFF Drain to Source Voltage in a JFET is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel, preventing any further current flow.
Gain to Source Voltage - (Measured in Volt) - Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage.

STEP 1: Convert Input(s) to Base Unit

Pinch OFF Drain to Source Voltage: 68.16 Volt --> 68.16 Volt No Conversion Required
Gain to Source Voltage: 0.0039 Volt --> 0.0039 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_off = V_off(d-s)-V_(g-s) --> 68.16-0.0039

Evaluating ... ...

V_off = 68.1561

STEP 3: Convert Result to Output's Unit

68.1561 Volt --> No Conversion Required

FINAL ANSWER

68.1561 Volt <-- Pinch OFF Voltage

(Calculation completed in 00.004 seconds)

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Created by Mohamed Fazil V

Acharya institute of technology (AIT), Bengaluru

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Verified by Parminder Singh

Chandigarh University (CU), Punjab

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< 9 FET Calculators

Ohmic Region Drain Current of FET

Go Drain Current = Channel Conductance*(Drain to Source Voltage+3/2*((Psi+Gain to Source Voltage-Drain to Source Voltage)^(3/2)-(Psi+Gain to Source Voltage)^(3/2))/((Psi+Pinch OFF Voltage)^(1/2)))

Transconductance of FET

Go Forward Transconductance = (2*Drain Current of Zero Bias)/Pinch OFF Voltage*(1-Gain to Source Voltage/Pinch OFF Voltage)

Drain Source Voltage of FET

Go Drain to Source Voltage = Supply Voltage at Drain-Drain Current*(Drain Resistance+Source Resistance)

Gate Substrate Capacitance of FET

Go Gate Substrate Capacitance = Gate Substrate Capacitance off Time/(1-(Gate Substrate Voltage/Psi))^(1/2)

Drain Current of FET

Go Drain Current = Drain Current of Zero Bias*(1-Gain to Source Voltage/Cuttoff Gain to Source Voltage)^2

Gate Source Capacitance of FET

Go Gate to Source Capacitance = Gate Source Capacitance off Time/(1-(Gain to Source Voltage/Psi))^(1/3)

Gate Drain Capacitance of FET

Go Gate to Drain Capacitance = Gate Drain Capacitance off Time/(1-Gate to Drain Voltage/Psi)^(1/3)

Pinch off Voltage of FET

Go Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage

Voltage Gain of FET

Go Voltage Gain = -Forward Transconductance*Drain Resistance

Pinch off Voltage of FET Formula

Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage
V_off = V_off(d-s)-V_(g-s)

What is Pinch off Voltage of FET ?

the pinch-off voltage is the gate-source voltage at which the channel is fully constricted, and current flow is cut off. In an n-channel JFET, the Vth is typically a negative voltage, while in a p-channel JFET, it's a positive voltage. Understanding and controlling the pinch-off voltage is essential for designing and operating FETs in electronic circuits, as it determines when the transistor begins to conduct and allows precise control of the device's operation.

How to Calculate Pinch off Voltage of FET?

Pinch off Voltage of FET calculator uses Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage to calculate the Pinch OFF Voltage, Pinch off Voltage of FET is the voltage at which the channel of the FET is pinched off, preventing further current flow. It is also known as the threshold voltage. In a junction field-effect transistor (JFET), the pinch-off voltage is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel. This happens because the gate voltage creates an electric field that attracts electrons away from the channel, forming depletion regions. When the depletion regions meet, they effectively close the channel, preventing any further current flow. Pinch OFF Voltage is denoted by V_off symbol.

How to calculate Pinch off Voltage of FET using this online calculator? To use this online calculator for Pinch off Voltage of FET, enter Pinch OFF Drain to Source Voltage (V_off(d-s)) & Gain to Source Voltage (V_(g-s)) and hit the calculate button. Here is how the Pinch off Voltage of FET calculation can be explained with given input values -> 68.1561 = 68.16-0.0039.

FAQ

What is Pinch off Voltage of FET?

Pinch off Voltage of FET is the voltage at which the channel of the FET is pinched off, preventing further current flow. It is also known as the threshold voltage. In a junction field-effect transistor (JFET), the pinch-off voltage is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel. This happens because the gate voltage creates an electric field that attracts electrons away from the channel, forming depletion regions. When the depletion regions meet, they effectively close the channel, preventing any further current flow and is represented as V_off = V_off(d-s)-V_(g-s) or Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage. Pinch OFF Drain to Source Voltage in a JFET is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel, preventing any further current flow & Gain to Source Voltage of a JFET is the ratio of the change in drain voltage to the change in source voltage.

How to calculate Pinch off Voltage of FET?

Pinch off Voltage of FET is the voltage at which the channel of the FET is pinched off, preventing further current flow. It is also known as the threshold voltage. In a junction field-effect transistor (JFET), the pinch-off voltage is the voltage at which the depletion regions of the gate junctions meet and pinch off the channel. This happens because the gate voltage creates an electric field that attracts electrons away from the channel, forming depletion regions. When the depletion regions meet, they effectively close the channel, preventing any further current flow is calculated using Pinch OFF Voltage = Pinch OFF Drain to Source Voltage-Gain to Source Voltage. To calculate Pinch off Voltage of FET, you need Pinch OFF Drain to Source Voltage (V_off(d-s)) & Gain to Source Voltage (V_(g-s)). With our tool, you need to enter the respective value for Pinch OFF Drain to Source Voltage & Gain to Source Voltage and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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