Abstract: A data reproducing circuit, and more particularly, a data reproducing circuit which records magnetization reversal patterns corresponding to a written digital signal onto a magnetic recording medium, and converts a received analog signal from the magnetic recording medium into a digital signal. The present invention has a pre-shift circuit to perform peak shift compensation in the recording process, an equalizer to perform peak shift compensation in the reproducing process, and a digital data reproducing circuit to reproduce data by differentiating the equalized signal received from the equalizer and generating a window signal. The equalizer means contains the first equalizer which compensates the peak position shifting in the received analog signal from the magnetic head and outputs the equalized signal used for differentiation, and the second equalizer which corrects the peak level variation of the analog signal and outputs the equalized signal used for window signal generation.

Abstract: A data reproducing circuit for a memory system having a data sensing head includes a first equalizing circuit for correcting a shift of a position of a peak of a reproduction signal supplied from the data sensing head and for generating a first signal in which the shift of the position of the peak has been corrected, and a second equalizing circuit for correcting a variation in an amplitude of the reproduction signal supplied from the data sensing head and for generating a second signal in which the variation of the amplitude of the reproduction signal has been corrected. A peak position detecting circuit detects the position of the peak of the reproduction signal from the first signal supplied from the first equalizing circuit. An amplitude detecting circuit detects the amplitude of the reproduction signal from the second signal supplied from the second equalizing circuit.