Page "Field-effect transistor" Paragraph 24
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Depletion-type FETs under typical voltages.
JFET, poly-silicon MOSFET, double-gate MOSFET, metal-gate MOSFET, MESFET.
< span style =" background-color :# 808080 ; color: black ;"> depletion </ span >, < span style =" background-color :# 0000FF ; color: white ;"> electrons </ span >, < span style =" background-color :# FF0000 ; color: black ;"> holes </ span >, < span style =" background-color :# 000000 ; color: white ;"> metal </ span >, < span style =" background-color :# FFFFFF ; color: black ; border: 1px solid black ;"> insulator </ span >.
Top = source, bottom = drain, left = gate, right = bulk.
Voltages that lead to channel formation are not shown
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1.800 seconds.