On 26/05/2011 09:52, Michael Watterson wrote:
> 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
> Diode drop.
> Out of saturation (>0.2V and up to Vsupply) it's more like a constant
> 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
> flowing through any PN or NP junctions.
>

Oh right, of course - thanks. I missed the context the statement was=20
made in.





--=20
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