Data clock separator with missing clock detect

Details Data clock separator with missing clock detect Data clock separator with missing clock detect

1976-02-02

1977-07-19

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 509

Patent

active

040372570

ABSTRACT:
Decoding apparatus for separating clock and data pulses from a double-frequency pulse train, including a retriggerable window one-shot, a bit shift compensation circuit, clock rate tracking means, data bit and clock bit gates, means for keeping track of whether a specific pulse is a data pulse or a clock pulse, and means for actuating the data bit and clock bit gates, based on the status of the system and the state of the window one-shot. The apparatus also provides means for detecting when a clock pulse is missing, including circuitry which simulates the detection of a clock pulse to the rest of the device to keep the system status and timing properly synchronized to the pulse train data.

REFERENCES:
patent: 3765005 (1973-10-01), Cannon
patent: 3827078 (1974-07-01), Bauer
patent: 3852811 (1974-12-01), Aghazadeh
patent: 3887942 (1975-06-01), Horowitz
patent: 3944940 (1976-03-01), Desai

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