define pinchoff voltage for a jfet
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Vgs is also known as the cutoffvoltage, the minimum current required to turn the JFET off. Pinch off voltage:Pinch off voltage is the drain to sourcevoltage after which the drain to source current becomes almost constant andJFET enters into saturation region and is defined only when gate to sourcevoltage is zero.
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Pinch-Off Voltage: For VGS=0 V, the value of VDS at which ID becomes essentially constant is the pinch-off voltage, VP.
For a given JFET, VP has a fixed value. A continued increase in VDS above the pinchoff voltage produces an almost constant drain current.
On resistance: The on resistance of JFET can be obtained from the equation for Id by defining it as
Vgs (off) is the gate to source voltage at which drain current becomes zero because of the spreading of depletion layer, which in turn reduces the length of conduction channel. P.S:The numerical value of both pinch off and Vgs (off) is same.
Pinch off voltage is the drain to source voltage after which the drain to source current becomes almost constant and JFET enters into saturation region and is defined only when gate to source voltage is zero
For a given JFET, VP has a fixed value. A continued increase in VDS above the pinchoff voltage produces an almost constant drain current.
On resistance: The on resistance of JFET can be obtained from the equation for Id by defining it as
Vgs (off) is the gate to source voltage at which drain current becomes zero because of the spreading of depletion layer, which in turn reduces the length of conduction channel. P.S:The numerical value of both pinch off and Vgs (off) is same.
Pinch off voltage is the drain to source voltage after which the drain to source current becomes almost constant and JFET enters into saturation region and is defined only when gate to source voltage is zero
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