Method of detecting alterations in signals corresponding to...

Details Method of detecting alterations in signals corresponding to... Method of detecting alterations in signals corresponding to...

H - Electricity

04

N

350/38, 352/18.5

H04N 5/76 (2006.01) G11B 20/18 (2006.01) G11B 27/10 (2006.01) G11B 27/36 (2006.01) H04N 5/94 (2006.01)

Patent

CA 1056944

ABSTRACT OF THE DISCLOSURE: The present invention relates to a method of detecting alterations in the signal furnished by the head used to read- out information recorded upon a data carrier. The read-out signal is converted by two voltage comparators whose thresholds are respectively lower and higher than the mean peak amplitude of the carrier signal in two squarewave signals which, applied to an assembly of monostable switching circuits associated with logic gates, are responsible for the production of a defect signal capable of controlling a defect correcting cir- cuit, which is fed with the read-out signal.

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