Patent US3577192A successfully refreshed from Google Patents.
US3577192A
Expired / Lapsed
US
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Reproduce head with peak sensing circuit
Assignee: International Business Machines Corp
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Filing: 1968-02-01
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Granted: 1971-05-04
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Expires: 1988-02-01
Abstract
Abstract In an apparatus for reproducing a data signal recorded on a magnetic medium, a playback circuit comprising a transducer providing an electrical signal, a linear integrator coupled to said signal transducing means for detecting the peaks of the electrical signal and for developing a peak-detected signal that traverses and is equal to a reference signal level in substantially simultaneous time correspondence with said peak; and a wave shaper for producing a digital waveform having transitions in simultaneous time correspondence with said peaks.
Inventors
- 👤 Carl E Schlaepfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:08
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1534; H03K5/01; H03K5/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
In an apparatus for reproducing a data signal recorded on a magnetic medium, a playback circuit comprising: means for recovering the magnetically recorded signal from said medium and for transducing such signal to an electrical signal; linear integrating means coupled to said signal transducing means for detecting the peaks of the electrical signal and for developing a peak-detected signal that traverses and is equal to a reference signal level in substantially simultaneous time correspondence with said peak; and means for shaping such peak detected signal to produce a digital waveform having transitions in simultaneous time correspondence with said peaks.
Claim 2
Dependent Claim
99 words
In an apparatus for reproducing a data signal recorded on a magnetic medium, a playback circuit comprising: means for recovering the magnetically recorded signal from said medium and for transducing such signal to an electrical signal; linear integrating means coupled to said signal transducing means for detecting the peaks of the electrical signal and for developing a peak-detected signal that traverses and is equal to a reference signal level in substantially simultaneous time correspondence with said peak; and means for shaping such peak detected signal to produce a digital waveform having transitions in simultaneous time correspondence with said peaks.
Claim 3
Dependent Claim
25 words
An apparatus as in claim 1, and further comprising an equalization circuit providing baseline correction coupled between said transducing means and said peak detecting means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |