hi,

Actually i want to use it for frequency measurment.
Problem with pll (currently implimented)is,its o/p has harmonics causing microcontroller to produce error of 1 digit (lsd) changing continually by +/- 1.

in short o/p does not remain stable even if there is no change in i/p

Mr. Raghu pl. post details about frequency actuated gate or related link

thanku