convertin variable voltage to constant voltage

[dilipya5]

i have a piezo electric transducer which genertes voltage from -2to 8volts.. i need to convert it into a constant voltage supply of 3.7v to charge a mobile battery . how can i do this???

 

[klystron]

Rectify the AC signal with Schotkey diodes

 

[dilipya5]

could u just elaborate your answer.........

---------- Post added at 17:47 ---------- Previous post was at 15:50 ----------

hey guys culd someone plz help me out...