Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1998-04-09
2000-04-18
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 65, G11B 509, G11B 5035
Patent
active
060522453
ABSTRACT:
Disclosed are an asymmetrical signal detector for detecting an asymmetrical quantity of an asymmetrical signal and a signal regenerating apparatus using this detector. This detector includes a first delaying element for delaying the input signal, a first subtracting element for subtracting an output of the first delaying element from the input signal, a second delaying element for delaying an output of the first subtracting element, an adding element for adding an output of the second delaying element to an output of the first subtracting element, a gate signal generating element for generating a gate signal by comparing an output of the adding element with a predetermined threshold value, a second subtracting element for subtracting the output of the subtracting element from the input signal and a selecting element for selecting an output of the second subtracting element in accordance with the gate signal, thereby obtaining an offset quantity. The detector further includes a third subtracting element for subtracting an output of the second delaying element from an output of the first subtracting element and a selecting element for selecting an output of the third subtracting element in accordance with the gate signal, thereby obtaining between-positive-negative amplitude error quantity.
REFERENCES:
patent: 4591939 (1986-05-01), Sakuma et al.
patent: 5469305 (1995-11-01), Madsen et al.
patent: 5583706 (1996-12-01), Dudley et al.
patent: 5731730 (1998-03-01), Muto
Ohshima Takenori
Sugawara Takao
Fujitsu Limited
Kim W. Chris
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