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generating low noise source of 100 microVolts to 1mV

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saurabh17g

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Hello,

I want to design a voltage source of with voltage ranges from 100 microVolts to 1 mV. I want it for biomedical instrumentation(EEG/ECG). I was thinking of voltage divider but that would not work because of resistance and supply noises. Please suggest me some better way.
 
How about one of these? You can use a low value resistive divider with a potentiometer to get the voltage range you want.
 
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