US3760282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recovery system
Assignee: International Business Machines Corp
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Filing: 1972-03-29
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Granted: 1973-09-18
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Expires: 1992-03-29
Abstract
Abstract A system for recovering data subject to amplitude and phase variations including one or more threshold detectors having a hysteresis effect, a peak detector for detecting the positive and negative peaks of a data input signal voltage, gating circuits for logically combining the outputs the threshold detectors with the output of the peak detectors to recover data subject to amplitude and phase variations.
Inventors
- 👤 R Arnold
- 👤 L Galetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:58
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H04; H04L; H04L25/00; H04L25/02; H04L25/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A data recovery system, comprising means for providing an input voltage signal; peak detecting means for detecting a peak value of said input voltage signal; threshold detecting means for detecting said input voltage signal at a value less than said peak value said threshold detecting means further comprising means for switching a threshold level from a first threshold level to a second threshold level in response to said input voltage signal exceeding said first threshold level to improve noise immunity; and gate means for logically combining an output of said peak detecting means with an output of said threshold detecting means to provide a recovered data output signal.
Claim 2
Dependent Claim
108 words
A data recovery system, comprising means for providing an input voltage signal; peak detecting means for detecting a peak value of said input voltage signal; threshold detecting means for detecting said input voltage signal at a value less than said peak value said threshold detecting means further comprising means for switching a threshold level from a first threshold level to a second threshold level in response to said input voltage signal exceeding said first threshold level to improve noise immunity; and gate means for logically combining an output of said peak detecting means with an output of said threshold detecting means to provide a recovered data output signal.
Claim 3
Dependent Claim
47 words
A data recovery system according to claim 1 wherein said peak detecting means comprises means for detecting positive and negative peaks of said input voltage signal; and said threshold detecting means comprises means for detecting a positive and a negative threshold value of said input voltage signal.
Claim 4
Dependent Claim
36 words
A data recovery system according to claim 1 wherein said means for providing an input voltage comprises voltage and power amplifying means to provide input signals to said peak detecting means and said threshold detecting means.
Claim 5
Dependent Claim
36 words
A data recovery system according to claim 3 wherein said amplifying means further comprises an amplifier circuit having a gain of minus 1 to provide an input signal to a portion of said threshold deTecting means.
Claim 6
Dependent Claim
56 words
A data recovery system according to claim 1 further comprising, a delay line; an input transducer to provide an input signal to said delay line; an output transducer to detect an output signal from said delay line; and storage means connected to the output of said gate means for storage of said recovered data output signal.
References Cited (Backward Citations)
US3585507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |