CA2259838A1 - Method and apparatus for retrieving data from a storage device - Google Patents

Method and apparatus for retrieving data from a storage device

Info

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
Application number
CA2259838A
Other languages
French (fr)
Other versions
CA2259838C (en
Inventor
Noboru Kimura
Wen-Yung Yeh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Discovision Associates
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US08/372,205 external-priority patent/US5894468A/en
Application filed by Individual filed Critical Individual
Publication of CA2259838A1 publication Critical patent/CA2259838A1/en
Application granted granted Critical
Publication of CA2259838C publication Critical patent/CA2259838C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • 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.
CA002259838A 1994-05-06 1995-05-05 Method and apparatus for retrieving data from a storage device Expired - Fee Related CA2259838C (en)

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)

Also Published As

Publication number Publication date
CA2259838C (en) 2000-11-07

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Effective date: 20150505