Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-05-13
1998-10-20
Swann, Tod R.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 59, 360 46, G11B 700
Patent
active
058257446
ABSTRACT:
In a first embodiment, a read detection channel includes a tracking threshold circuit for generating a variable threshold signal and a detection circuit, which is configurable in a number of diverse configurations that each correspond to one of the multiple diverse data formats. In addition, the first embodiment of the read detection channel includes a configuration circuit that automatically selects one of the configurations of the data detection circuit in response to a detection of a format of the input data stream. The first embodiment of the read detection channel permits data bits encoded in multiple diverse data formats to be decoded utilizing a single configurable read detection channel. In a second embodiment, the configurable read detection channel includes a tracking threshold circuit that can be configured to generate a threshold output signal in response to an input signal or in response to the input signal and a phase error signal. The second embodiment of the read detection channel further includes a detection circuit, which indicates data bits detected within the input signal in response to the threshold output signal, and at least one phase-locked loop coupled to the detection circuit, which places each detected data bit within one of a plurality of bit cells within an output data stream. The phase-locked loop also generates a phase error signal that can be selectively coupled to the tracking threshold circuit.
REFERENCES:
patent: 4006292 (1977-02-01), Schaefer
patent: 4821253 (1989-04-01), Usui et al.
patent: 4949196 (1990-08-01), Davie et al.
patent: 5121369 (1992-06-01), Makansi
patent: 5293369 (1994-03-01), Melas et al.
patent: 5298901 (1994-03-01), Lekmine et al.
patent: 5315284 (1994-05-01), Bentley et al.
patent: 5442315 (1995-08-01), Hutchins
patent: 5502711 (1996-03-01), Clark et al.
patent: 5508855 (1996-04-01), Hutchins et al.
patent: 5530601 (1996-06-01), Hutchines et al.
Fennema et al., "On-Track Focus Offset Calibration," IBM Technical Disclosure Bulletin, vol. 32, No. 12, May 1990, pp. 334-345.
Clark Alan Robert
Hutchins Robert Allen
Jaquette Glen Alan
Chu Kim-Kwok
Dillon Andrew J.
International Business Machines - Corporation
Russell Brian F.
Shifrin Daniel A.
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