Digital data encoding and reconstruction circuit

摘要

A digital data encoding and reconstruction circuit is improved by substantially eliminating erroneous and unwanted data readings due to imperfections in the magnetic recording media, excessive shoulders, electronic noise and the like by the use of pulse width discrimination. Since the time between successive transitions caused by valid data is greater than the time duration between transitions caused by erroneous signals, a counter or timer is used to determine and select only transitions caused by valid data in the read signal.