vicious5id
New Member
Good work, vicious5id.
LoL, I guess I need to express my gratitude to LC for that!
Oh, I actually didn't realise the current Ir (reference current) was through the ZR423, I had assumed it was the current through the 10k pot. So now it's a case of decreaseing the 70k resistance to obtain a current through the ZR423 of ~150 uA (according the the datasheet, that's the optimum current).
LC, did you just assume there was a 1.25 V drop across the 10k pot to work out the current through it and the ZR423? If so can I take the resistance of the ZR423 to be 50k (according to the thumbnail in post #20)?
In the graphs I posted prior, the one titled, "Vin+, Vin- VS Time", the blue line is Vin+; I want that line to be pretty much straight as soon as I set the current. I want the blue line to do what it does in the first ~200 secs, to do it in the first second or half-second.
Many thanks, v5.
EDiT: That 70k needs to be changed to a 43k or 43k6 to be precise.
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