Anniyan_x
Member
I must confess, it seems that I did misunderstand something - caused by the terms "stability" and "instability" used in the previous postings.
Most probably, your problems have nothing to do with the classical "system instability" caused by feedback loops. Instead, you "only" observe two different states which should be equal in theory, right?
So I have to reconsider the whole problem.
W.
YUP.. and the other thing is the problem only comes up in the new board which in the CPLD have been removed and changed to IC's, in the old board the difference is smaller between the 2states so it is ignorable(here, i mean after the ADC conversion).. i have added a new measurement result and the indicate the places in took the measurement..u can see at my post no 22. maybe u can get some ideas. the difference in measurement was in at the op-amp(voltage follower)..so i thought something wrong here.
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