{HEAD ~ The data reproducing device} 12, wherein said filter circuit comprises at least a switching member for passing electric currents corresponding to said predetermined component, and wherein {TAIL ~ said conversion circuit} comprises a comparator whose input terminals are arranged to receive voltage values representative of the predetermined component, and a predetermined reference voltage value 
{ HEAD ~ The data reproducing device } 12 , wherein said filter circuit comprises at least a switching member for passing electric currents corresponding to said predetermined component , and wherein { TAIL ~ said conversion circuit } comprises a comparator whose input terminals are arranged to receive voltage values representative of the predetermined component , and a predetermined reference voltage value
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