From: D. C. Sessions ([email protected])
Date: Tue Apr 18 2000 - 10:24:57 PDT
Josip Popovic wrote:
> #2. The same gnd voltage drop would tend to decrease conductivity of the
> N channel output transistors, however most of output stages have a pre
> driver section that is referenced to the same gnd. This in return would
> give that voltage of the gate of the N channel transistor to the
> transistor source is differentially always the same. Consequently #2 is
> not of such importance as #1.
Except that the gate pulldown devices (predriver N-channel) aren't the
ones driving the pulldown gate (final N-channel) on high-to-low transitions.
The final gate is being driven from the positive rail, and rising source
(ground) potentials come out of Vgs with quadratic impact on channel currents.
-- D. C. Sessions [email protected]
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