Here.. I wanna tell u that if u use simlple logic level input i.e. +5v and 0v then one of the MOSFET will not be in cutoff region as this is DEMOSFET... the channel is there even if u put reverse polarity at gate.. so I used more negative volt for putting MOSFET completely in cutoff region.. U can try by taking simple logic level input...
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Problem Solved... thanks for all who helped...