very low voltage ac to dc

Thread Starter

abdulmajeeth

Joined Feb 12, 2009
2
Hi

I want to convert 0- 250 mv 10 Hz ac signal to 0-25 mv DC signal and fed to a A/D.

If I use diode to rectify then loss of signal due to very low voltage.Any method??

Can any one help with circuit?
 

thingmaker3

Joined May 16, 2005
5,083
1) run your signal through an amplifier

2) run the amplifier output through a precision rectifier

3) sample the precision rectifier output via a voltage divider.
 
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