Analysis of information sources in references of the Wikipedia article "JFET" in English language version.
Do not confuse cutoff with pinch off. The pinch-off voltage VP is the value of the VDS at which the drain current reaches a constant value for a given value of VGS. ... The cutoff voltage VGS(off) is the value of VGS at which the drain current is 0.
The "pinch-off region" (or "saturation region") refers to operation of a FET with more than a few volts.
Saturation or Active Region
value of vGS ... for which the channel is completely depleted ... is called the threshold, or pinch-off, voltage and occurs at vGS = VGS(OFF). ... This linear region of operation is called ohmic (or sometimes triode) ... Beyond the knee of the ohmic region, the curves become essentially flat in the active (or saturation) region of operation.
At this value of vGS the channel is completely depleted ... For JFETs the threshold voltage is called the pinch-off voltage and is denoted VP.
Pinch off Voltage (VP). It is the minimum drain–source voltage at which the drain current essentially becomes constant. ... Gate–source cut off voltage VGS (off). It is the gate–source voltage where the channel is completely cut off and the drain current becomes zero.
The envelope or enclosure symbol may be omitted from a symbol referencing this paragraph, where confusion would not result
The envelope or enclosure symbol may be omitted from a symbol referencing this paragraph, where confusion would not result
ohmic region ... also called the linear region
At this value of vGS the channel is completely depleted ... For JFETs the threshold voltage is called the pinch-off voltage and is denoted VP.
yfs – Small-signal, common-source, forward transadmittance (sometimes called gfs-transconductance)
Pinch off Voltage (VP). It is the minimum drain–source voltage at which the drain current essentially becomes constant. ... Gate–source cut off voltage VGS (off). It is the gate–source voltage where the channel is completely cut off and the drain current becomes zero.
value of vGS ... for which the channel is completely depleted ... is called the threshold, or pinch-off, voltage and occurs at vGS = VGS(OFF). ... This linear region of operation is called ohmic (or sometimes triode) ... Beyond the knee of the ohmic region, the curves become essentially flat in the active (or saturation) region of operation.
For JFETs the gate-source voltage at which drain current approaches zero is called the "gate-source cutoff voltage", VGS(OFF), or the "pinch-off voltage", VP ... For enhancement-mode MOSFETs the analogous quantity is the "threshold voltage"
Pinch off Voltage (VP). It is the minimum drain–source voltage at which the drain current essentially becomes constant. ... Gate–source cut off voltage VGS (off). It is the gate–source voltage where the channel is completely cut off and the drain current becomes zero.
For JFETs the gate-source voltage at which drain current approaches zero is called the "gate-source cutoff voltage", VGS(OFF), or the "pinch-off voltage", VP ... For enhancement-mode MOSFETs the analogous quantity is the "threshold voltage"
Pinch off Voltage (VP). It is the minimum drain–source voltage at which the drain current essentially becomes constant. ... Gate–source cut off voltage VGS (off). It is the gate–source voltage where the channel is completely cut off and the drain current becomes zero.