On 25/05/2011 22:42, Oli Glaser wrote:
> On 25/05/2011 13:06, Olin Lathrop wrote:
>> and bipolars more like a voltage source.
> Do you mean current source here?
>

In saturation it looks like a voltage source, i.e. like a 0.2V or 0.15=20
Diode drop.
Out of saturation (>0.2V and up to Vsupply) it's more like a constant=20
current source programmed by the base current.
Ic =3D Ib x Hfe

A FET looks like a resistor when "fully on" as  the current is not=20
flowing through any PN or NP junctions.

--=20
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