Self-clocking magnetic record sensing system
US3962726A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1975 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Feb 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1419
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system is disclosed for sensing a single moving magnetic track, to provide two distinct binary signals (clock and binary data) representative of digital information. Magnetically recorded signals in the Manchester or F/2F code format are selectively processed into electrical representations, using time and amplitude criteria to verify and distinguish between clock (sync) pulses and binary data pulses. An amplitude discriminator is controlled on the basis of the amplitude of immediately prior signals as well as the character of prior binary data pulse signals. A time discriminator is controlled (to segregate clock and data pulse signals) on the basis of the interval of immediately prior signals as well as the character (1 or 0) of prior binary data pulse signals. Consequently, the system is tolerant with regard to signal quality and speed consistency of the relative motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.