N-Channel JFET characteristics curve with IDSS = 8 mA and VP = -4 V. The region where ID depends on VDS is called the linear/triode/ohmic region.The region where ID constant â The saturation/pinch-off region.If VGS is less than pinch-off voltage, the resistance becomes an open-circuit therefore the device is in cutoff (VGS=VGS(off) ).The resistance value is under the control of VGS.Thus, the initial channel resistance is higher (in which the initial slope of the curves is smaller for values of VGS closer to the pinch-off voltage (VP).For negative values of VGS, the gate-to-channel junction is reverse biased even with VDS=0.JFET for VGS = 0 V and 0
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