US3577192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproduce head with peak sensing circuit
Assignee: International Business Machines Corp
•
Filing: 1968-02-01
•
Granted: 1971-05-04
•
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 03:19
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.
References Cited (Backward Citations)
US2835882A
Cited
US2961642A
Cited
US3215995A
Cited
US3402402A
Cited
US3337859A
Cited
US3381083A
Cited
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 |