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Depletion mode MOSFETs vs. JFETs

J

Joel Kolstad

Jan 1, 1970
0
Assuming you're not intending to forward bias a JFET's gate, is there much of
a difference between designing a circuit using a depletion mode MOSFET vs. a
JFET? What are the pros and cons of each? Or -- if they're not so
dissimilar -- is this one of the reason that depletion mode MOSFETs are
relatively unusual?

(I'm assuming N channel devices here since -- per AoE -- P channel JFETs
aren't generally available.)

As far as I can tell, the most obvious difference is that there's a reverse
leakage current coming out of a JFET's gate, whereas MOSFET gate leakage is
almost nothing.

---Joel Kolstad
 
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