my thesis is about design and implementation of nth order bandpass filter....can u give info regarding the design n schematic circuit n specifications which are needed...??

 

Why don't you first do a Google search on Sallen-Key and bandpass filters to get some background on what you are trying to accomplish. If you ask a vague question with little input on your side, you will get vague answers (like mine) which provide you with little information.

Vahe