Editing JFET (section)

== Schematic symbols ==
[[Image:JFET N-dep symbol.svg|thumb|100px|[[electronic symbol|Circuit symbol]] for an n-channel JFET]]
[[Image:JFET P-dep symbol.svg|thumb|100px|Circuit symbol for a p-channel JFET]]

The JFET gate is sometimes drawn in the middle of the channel (instead of at the drain or source electrode as in these examples). This symmetry suggests that "drain" and "source" are interchangeable, so the symbol should be used only for those JFETs where they are indeed interchangeable.

The symbol may be drawn inside a circle (representing the envelope of a discrete device) if the enclosure is important to circuit function, such as dual matched components in the same package.<ref>{{Cite book |url=https://www.julesbartow.com/Construction/ANSI%20Y32.2-1975.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.julesbartow.com/Construction/ANSI%20Y32.2-1975.pdf |archive-date=2022-10-09 |url-status=live |title=ANSI Y32.2-1975 |chapter=A4.11 Envelope or Enclosure |quote=The envelope or enclosure symbol may be omitted from a symbol referencing this paragraph, where confusion would not result}}</ref>

In every case the arrow head shows the polarity of the P–N junction formed between the channel and the gate. As with an ordinary [[diode]], the arrow points from P to N, the direction of [[Electric current#Conventional current|conventional current]] when forward-biased. An English [[mnemonic]] is that the arrow of an N-channel device "points i'''n'''".