Bit shift post-compensation using sampled data prequalifier

Details Bit shift post-compensation using sampled data prequalifier Bit shift post-compensation using sampled data prequalifier

1992-03-04

1994-01-04

Sniezek, Andrew L.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 60, 369 4434, 360 45, G11B 700

Patent

active

052766667

ABSTRACT:
A circuit and method for correcting peak signal shifts in analog signals representing binary data bits that avoids the need for write precompensation techniques. Three different sample values (an early, on-time, and late) are computed for the signal representing each read bit. The on-time signal value of each data bit of an n-bit sequence is used if no data corruption is detected. If a corrupted data bit is detected due to an early or late peak signal shift of an adjacent binary 1, the early or late signal value of the corrupted data bit is used rather than the on-time signal value of the corrupted bit. The corrected data bit sequence is then passed on to a utilization circuit, such as a read data detector, which uses error correcting techniques and the like to determine with precision whether each data bit is a binary 1 or a .0..

REFERENCES:
patent: 3577192 (1971-05-01), Schlaepfer
patent: 3719934 (1973-03-01), Behr et al.
patent: 3735372 (1973-05-01), Coccagna
patent: 3810232 (1974-05-01), Aghazadeh
patent: 4742403 (1988-05-01), Troletti
patent: 4885645 (1989-12-01), Hashimoto
patent: 5187614 (1993-02-01), Hashimoto et al.

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