Drop-out location detection circuit

Details Drop-out location detection circuit Drop-out location detection circuit

1995-04-19

1997-05-06

Beausoliel, Jr., Robert W.

Excavating

371 571, 375224, 375239, 360 46, H01S 303

Patent

active

056278462

ABSTRACT:
A digital data reproducing circuit for use with a magnetic or optical data storage for detecting and flagging signal level drop-outs in pulse position modulated (PPM) recorded signal levels. Positive and negative peak amplitudes of a self-clocking PPM coded signal are compared to positive and negative valid information peak detectors to detect the clock and PPM data. Lower peak (in absolute terms) amplitudes that fall from the normal signal levels at the start of a drop-out and/or rise at the end of the drop-out, are detected by positive and negative drop-out peak detectors. The positive and negative drop-out peak detectors are inhibited when valid clock and data peak pulses are detected.

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