CURRENT SUPPLY - one last thing.
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Not being a morning person, I mispoke -- the circuit I discussed is not a
current mirror. A current mirror has 2 transistors and uses 1 to set the
current of the other. You often use two transistors in one package so that
they hold the same temp and the error is much smaller. I don't know the
right name for the circuit I described, but a mirror is the next step up.
Sorry about that!
Al Williams
AWC
current mirror. A current mirror has 2 transistors and uses 1 to set the
current of the other. You often use two transistors in one package so that
they hold the same temp and the error is much smaller. I don't know the
right name for the circuit I described, but a mirror is the next step up.
Sorry about that!
Al Williams
AWC
Comments
> Not being a morning person, I mispoke -- the circuit I discussed is not a
> current mirror. A current mirror has 2 transistors and uses 1 to set the
> current of the other. You often use two transistors in one package so that
> they hold the same temp and the error is much smaller. I don't know the
> right name for the circuit I described, but a mirror is the next step up.
>
>
I think what you described is called a constant current source.
[noparse];)[/noparse]
Jerry
--
Jerry A. Covington
jerry@p...