Reduction in microvolts

[Navaneeth.A.Gowda]

I have recorded EEG data using openBCI which is in the range of -15000 to 15000 micro volts. I want to reduce this to the range of -100 to 100 micro volts. How do I do it?

 

[FvM]

Why reduce? How do you achieve 15 mV signal, regular EEG lead is in a 100 µV range. Are you asking about removing unwanted noise?

 

[KlausST]

Hi,

"I have recorded" ... thus I guess you now have digital values.
So a simple mathematical multiply will adjust the range.

Klaus

 

[crutschow]

I have recorded EEG data using openBCI which is in the range of -15000 to 15000 micro volts. I want to reduce this to the range of -100 to 100 micro volts. How do I do it?

I see no good reason to do that, but you could use a resistive divider.

 

[notfet]

An op amp can be used as an attenuator with a higher value of Rg than Rf. On that note I have a similar question. I am trying to get nanoVolt response out of a DAC but the smallest reference is 400Mv which leaves terrible resolution out of my DAC. Is the best solution to use my OP-amp attenuator best used to do a 1:10 reduction on the Ref in? or should I use the reduction on the DAC out?