MOSFET in saturation

Discussion in 'General Electronics Chat' started by vustudent, Sep 30, 2010.

  1. vustudent

    Thread Starter Active Member

    Mar 11, 2009
    Given a MOSFET in saturation, where Vds> Vgs - Vth and there is pinch off in the at the drain side of the channel, why would there still be a constant current? Even when the channel has physically disappeared?
  2. Ghar

    Active Member

    Mar 8, 2010
    The channel doesn't physically disappear, it's just very constrained. This is why it's constant current - you're trying to drive more current than the channel can support therefore you get the maximum it can support.