CA2259838A1 - Method and apparatus for retrieving data from a storage device - Google Patents
Method and apparatus for retrieving data from a storage deviceInfo
- Publication number
- CA2259838A1 CA2259838A1 CA2259838A CA2259838A CA2259838A1 CA 2259838 A1 CA2259838 A1 CA 2259838A1 CA 2259838 A CA2259838 A CA 2259838A CA 2259838 A CA2259838 A CA 2259838A CA 2259838 A1 CA2259838 A1 CA 2259838A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- conditioned
- threshold
- storage device
- output signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001143 conditioned effect Effects 0.000 abstract 3
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
An apparatus and method for retrieving densely stored data from various types of magnetic media. A medium is scanned to provide an input signal. The input signal is conditioned through differentiation, equalization and partial integration. Positive and negative signal peak detectors are connected to the conditioned signal, and a threshold signal is generating corresponding to an average or midpoint of the measured positive and negative signal peaks. An output signal is generated by comparing the conditioned signal and the threshold signal. The DC component of the input signal is accounted for by feeding back the output signal and adjusting the threshold signal based on the duty cycle of the output signal.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23883194A | 1994-05-06 | 1994-05-06 | |
US08/238,831 | 1994-05-06 | ||
US08/372,205 | 1995-01-13 | ||
US08/372,205 US5894468A (en) | 1994-05-06 | 1995-01-13 | Data recovery with differentiation and partial integration stages to eliminate noises and DC offset level |
CA002148748A CA2148748C (en) | 1994-05-06 | 1995-05-05 | Method and apparatus for retreiving data from a storage device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002148748A Division CA2148748C (en) | 1994-05-06 | 1995-05-05 | Method and apparatus for retreiving data from a storage device |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2259838A1 true CA2259838A1 (en) | 1995-11-07 |
CA2259838C CA2259838C (en) | 2000-11-07 |
Family
ID=27170009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002259838A Expired - Fee Related CA2259838C (en) | 1994-05-06 | 1995-05-05 | Method and apparatus for retrieving data from a storage device |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2259838C (en) |
-
1995
- 1995-05-05 CA CA002259838A patent/CA2259838C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2259838C (en) | 2000-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20150505 |