System for processing signals reproduced from a digital magnetic record in a recorder-reproducer
US4905102A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A distorted signal available at the output of a preamplifier which are derived from a magnetically recorded digital signal is differentiated twice. The second derivative signal obtained by that double differentiation is used to derive one set of pulses corresponding to both positive and negative peaks of the twice differented signal, which are then used to clock a D-flipflop. Another set of pulses is derived from the double differentiated signal responding to peaks of only one polarity thereof and these are applied to the D input of the flipflop. The output of the flipflop is a reconstituted replica of the digital signal that was originally recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.