Re: some questions about high precesion constant current source
- From: Robert Baer <robertbaer@xxxxxxxxxxxxx>
- Date: Tue, 30 Aug 2005 07:15:05 GMT
eehinjor wrote:
It would help if you posted the circuit in question on abse.the output is shifting from 0.99uA to 1.001uA.
In my circuit,there is a variable resistor,but it is serial with 4990K,the goal is to achieve 5000K resistor.
I don't understant Bill by the 10R resistor.the voltage is 5V,so the 10R is so far.
Keep in mind that Vgs of a FET changes over temperature at a given current..
A 100 ohm resistor in series with the gate of a FET is to help prevent HF oscillations.
.
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