Dear All

I want to design a precise full wave rectifier using op-amps for the following specification

• Input voltage level : 110uV to 7.04V
• Input signal frequency : 45Hz to 55Hz
• Output voltage level should not exceeds the ±12V

 

Wikipedia is your friend...

http://www.play-hookey.com/analog/full-wave_rectifier.html

I found the above link here...

http://en.wikipedia.org/wiki/Precision_rectifier