Hello there, At gate-source cut off voltage, Vgs(off) (which you call threshold voltage in ktechlab) the drain current,Id should become zero. However it isn't the case.
see attached: p-type.circuit But the n-type jfet simulates its input/output characteristics properly. To my guess, in today's svn snapshot, ktechlab allows the _same_ circuit for n-type and p-type jfets (except the sign of the drain current is automatically set,which is good). see attached : jfet_characteristics.circuit Generally, a p-channel JFET operates in the same manner as an n-channel JFET except that channel current carriers will be holes instead of electrons and the polarities of Vgs and Vds are reversed. In my jfet_characteristics.circuit, one can see the polarities of Vgs and Vds are _NOT_reversed for both cases. regards, Chitlesh
ptype.circuit
Description: application/circuit
jfet_characteristics.circuit
Description: application/circuit
pgp0kS3QAI9kv.pgp
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