MAGNETIC REPRODUCING SYSTEM FOR A DIGITAL SIGNAL

摘要

A magnetic reproducing system reproduces a recording two-valued code signal from a magnetic recording medium, and detects the signal level of the reproduced signal to reproduce a digital signal of the above desired two-valued code through a converter and a delay circuit and then feeding back this digital signal to carry out a modulo-2 addition. The magnetic recording medium is recorded with the above recording two-valued code signal. The magnetic reproducing system comprises a magnetic head for reproducing the two-valued code recorded on the magnetic recording medium, an equalizer for performing wave-equalization of the signal reproduced by the magnetic head, and a signal detection circuit for detecting the signal level of a three-valued code signal obtained from the above equalizer, to produce a two-valued detection signal in which signal levels corresponding to "+1" and "-1" of the three-valued code signal is set to a signal level "+1" and a signal level corresponding to "0" of the three-valued code signal is set to a signal level "0", as a reproduced output signal of the digital signal.