Dear Sagar, did you mean a diode bridge?

 

A diode bridge or bridge rectifier is an arrangement of four diodes connected in a bridge circuit as shown below, that provides the same polarity of output voltage for any polarity of the input voltage. When used in its most common application, for conversion of AC input into DC output, it is known as a bridge rectifier. The bridge recitifier provides full wave rectification from a two wire AC input (saving the cost of a center tapped transformer) but has two diode drops rather than one reducing efficiency over a center tap based design for the same output voltage.

The essential feature of this arrangement is that for both polarities of the voltage at the bridge input, the polarity of the output is constant.

 

i deally this should suffice. lemme know if more is needed.

 

cheero

 

~admin