In wireless topology we using filters as main part of system, we proposed a flexible filter for multi-purposes working at ISM band frequency. Obviously the filter idea works by splitting the Band Pass Filter into two types H.P.F & L.P.F controlled by logic circuit to select the desired filter. However the proposed filter can be working as HPF or LPF combines together provide BPF. ISM band [402-405MHz] the unlicensed frequency is selected to work at ISM band for medical applications. ISM (Industrial Scientific Medical)
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