pepper856
Newbie level 5
Hello. I have a question about ‘Current integrator’s input noise’.
I use a typical current integrator structure using single-ended amp, switch and capacitor. (left fig.)
The thing is if external noise is induced in the ‘Current input (-)’ or ‘VREF node (+)’, the integrator output fluctuate greatly and the error becomes very large.
Therefore, I’m trying to apply the pre-processing circuit which can attenuate the external noise. (right fig.)
In my opinion, can I use the ‘Current buffer circuit’ for the current input node and the ‘Unity gain buffer’ for the VREF node to reduce the influence of external noise?
It would be a great help if you let us know similar experiences or references.
Thank!
I use a typical current integrator structure using single-ended amp, switch and capacitor. (left fig.)
The thing is if external noise is induced in the ‘Current input (-)’ or ‘VREF node (+)’, the integrator output fluctuate greatly and the error becomes very large.
Therefore, I’m trying to apply the pre-processing circuit which can attenuate the external noise. (right fig.)
In my opinion, can I use the ‘Current buffer circuit’ for the current input node and the ‘Unity gain buffer’ for the VREF node to reduce the influence of external noise?
It would be a great help if you let us know similar experiences or references.
Thank!