The
MOSFET V
GS(th) or
gate threshold voltage is the
voltage between the
gate and
source that is needed to turn on the
MOSFET. In other words, if V
GS is at least as high as the
threshold voltage, the
MOSFET turns on. Some persons may be wondering just how much of a current I
D can be passed on this "
MOSFET on" state.
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7.4. Threshold voltage
- 7.4. Threshold voltage calculation. The threshold voltage equals the sum of the flatband voltage, twice the bulk potential and the voltage across the oxide due to the depletion layer charge, or: ...
- 7.4. The substrate bias effect.
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The threshold voltage, commonly abbreviated as Vth, of a field-effect transistor (FET) is the minimum gate-to-source voltage VGS (th) that is needed to create a conducting path between the source and drain terminals. It is an important scaling factor to maintain power efficiency.