Frequently Asked Questions

FAQ	FAQ ID
How do I test a diode for Reverse Voltage Leakage Current on my curve tracer? Reverse Voltage Leakage CurrentWhat It Is:Reverse voltage leakage current is the IR that flows when the specified value of VR is applied to the anode.On the curve tracer, the Collector Supply drives the anode.What The Display Shows:The display shows...	835706
How do I test a JFET for Gate-Source Breakdown Voltage on my curve tracer? Gate-Source Breakdown Voltage - V(br)GSS What It Is:Gate-source breakdown voltage is the VGS at which a specified IG flows with VDS=0. Since it's the reverse current across a junction, IG exhibits a knee shaped rise, increasing rapidly once...	835707
How do I test a JFET for Gate-Source Cutoff Voltage on my curve tracer? Gate-Source Cutoff Voltage - VGS(Off)(aka Pinch-Off Voltage)What It Is:Gate-source cutoff voltage is the VGS necessary to reduce ID to a specified value.On the curve tracer, VDS is forced by the Collector Supply and VGS is forced by the Step...	835708
How do I test a JFET for Reverse Gate Leakage on my curve tracer? Reverse Gate Leakage - IGSSWhat It Is:Reverse gate leakage is the IG that flows at a specified VGS and with VDS=0. Since it's the reverse current across a junction, IG exhibits a knee shaped rise, increasing rapidly once breakdown occurs.On the...	835709
How do I test a JFET for Small Signal Forward Transfer Admittance on my curve tracer? Small SignalForward Transfer Admittance - \|Yfs\|(aka Small Signal Transconconductance - Gm)What It Is:Small signal forward transfer admittance is the ratio of a change in ID to a change in VGS, with the initial VGS value usually = 0. The (Delta I/...	835710
How do I test a JFET for Zero Gate Voltage Drain Current on my curve tracer? Zero Gate Voltage Drain Current - IDSSWhat It Is:Zero gate voltage drain current is the ID that flows when VDS is at a specified value and VGS=0.On the curve tracer, the Collector Supply forces VDS and the gate is shorted to the source so that VGS=...	835711
How do I test a SCR for Gate Trigger Current on my curve tracer? Gate Trigger Current - IGTWhat It Is:Gate trigger current is the gate current required to switch the device from the blocked (Off) state to the unblocked (On) state.On the curve tracer, the anode is driven by the Collector Supply and the gate is...	835712
How do I test a SCR for Gate Trigger Voltage on my curve tracer? Gate Trigger Voltage - VGTWhat It Is:Gate trigger voltage is the gate voltage required to switch the device from the blocked (Off) state to the unblocked (On) state.On the curve tracer, the anode is driven by the Collector Supply and the gate is...	835713
How do I test a SCR for Holding Current on my curve tracer? Holding Current - IHWhat It Is:With the device in the unblocked (On) state, holding current is the minimum value of anode current required to keep it in the on-state, with gate drive removed.On the curve tracer the Collector Supply drives the anode...	835714
How do I test a SCR for Peak Forward Blocking Current on my curve tracer? Peak Forward Blocking Current - IDRMWhat It Is:With no gate signal applied, peak forward blocking current is the maximum anode current that flows with the SCR in the blocked (Off) state.On the curve tracer, the Collector Supply drives the anode and...	835715

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