Self-clocking magnetic record sensing system
Patent 3962726 Issued on June 8, 1976. Estimated Expiration Date: 
June 8, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 8, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3689903 3711843 3810234 3827078 3838448 InventorAssigneeApplicationNo. 551875 filed on 02/21/1975US Classes:360/51, Data clocking360/45Pulse crowding correctionExaminersPrimary: Canney, Vincent P.Attorney, Agent or FirmInternational ClassG11B 20/14 (20060101)AbstractA 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. | |
