Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1995-12-26
1998-11-17
Young, W. R.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 49, G11B 509
Patent
active
058385096
ABSTRACT:
A circuit for variably adjusting a data detection level for processing a read signal picked-up from a magnetic disk. The circuit includes a pulse detecting unit for detecting an amplitude peak of a read signal picked-up from the magnetic disk, comparing the read signal with a preset data detection level, and detecting an amplitude peak corresponding to real data among the detected amplitude peaks as output data; a dynamic detection level generating unit for generating a dynamic detection level voltage having a level varying in correspondence with a level of the read signal; a fixed detection level generating unit for generating a fixed detection level voltage having a preset constant level; an interval detecting unit for detecting from data detected by the pulse detecting unit an interval where a transducer head is positioned on the magnetic disk and discriminating a servo information interval and a data information interval; and a switch unit for selecting one of outputs of the fixed detection level generating unit and the dynamic detection level generating unit in correspondence with an interval detected by the interval detecting unit and providing the selected voltage as a data detection level.
REFERENCES:
patent: 4562549 (1985-12-01), Tanaka et al.
patent: 4686586 (1987-08-01), Dutcher
patent: 4771188 (1988-09-01), Cheng et al.
patent: 5003408 (1991-03-01), Farkas et al.
patent: 5128629 (1992-07-01), Trinh
patent: 5150050 (1992-09-01), Genheimer et al.
patent: 5287063 (1994-02-01), Izawa
patent: 5287227 (1994-02-01), Cronch et al.
patent: 5293275 (1994-03-01), Kawasaki
patent: 5305157 (1994-04-01), Wada et al.
patent: 5368011 (1994-11-01), Tollum
patent: 5436771 (1995-07-01), Yun
patent: 5440433 (1995-08-01), Yun
patent: 5452147 (1995-09-01), Yamashita et al.
Bushnell Esq. Robert E.
Neal Regina Y.
Samsung Electronics Co,. Ltd.
Young W. R.
LandOfFree
Data detection level adjusting circuit for processing signal in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data detection level adjusting circuit for processing signal in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data detection level adjusting circuit for processing signal in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-890555