Patent US3705353A successfully refreshed from Google Patents.
US3705353A
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Apparatus for the treatment of information signals
Assignee: Centre National d'Études Spatiales
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Filing: 1970-07-13
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Granted: 1972-12-05
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Expires: 1990-07-13
Abstract
Abstract The processing of an information carried by a frequency with the object of digitizing it is performed along the so-called ''''quasiconstant'''' system used in PFM type telemetric data analysis. Two like but distinct circuits each operating in accordance with the ''''quasi-constant'''' system are used - the recorded information signal and a fresh reference frequency delivered by a clock are respectively applied to the two inputs of one of these circuits, whereas the recorded reference signal and the same fresh reference frequency as above are respectively applied to the two inputs of the other of these circuits.
Inventors
- 👤 Jean-Martial Randoing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:02
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/22; G11B20/225
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
An apparatus for the processing of a frequency-carried information signal and a reference signal both recorded on a same support subject to distortion at playback of recorded data arising from flutter or the like, comprising: a first QUATANT device (Q1) having an information signal input (X1) and a reference signal input (Y1), a second QUATANT device (Q2) having an information signal input (X2) and a reference signal input (Y2), and cooperatively associated with said first QUATANT device to operate conjointly therewith, means for picking-up from said support said information signal (f'') and applying the same to said information signal input (X1) of said first QUATANT device (Q1), means for simultaneously picking-up said reference signal (F'') and simultaneously applying the same to said information signal input (X2) of said second QUATANT device (Q2), and means (11) for delivering a same reference frequency ( theta ) Simultaneously to both said reference signal inputs (Y1, Y2), and simultaneous with the application to said information signal inputs (X1, X2) of the respective signals (f'', F''), whereby said distortion is eliminated.
Claim 2
Independent Claim
176 words
An apparatus for the processing of a frequency-carried information signal and a reference signal both recorded on a same support subject to distortion at playback of recorded data arising from flutter or the like, comprising: a first QUATANT device (Q1) having an information signal input (X1) and a reference signal input (Y1), a second QUATANT device (Q2) having an information signal input (X2) and a reference signal input (Y2), and cooperatively associated with said first QUATANT device to operate conjointly therewith, means for picking-up from said support said information signal (f'') and applying the same to said information signal input (X1) of said first QUATANT device (Q1), means for simultaneously picking-up said reference signal (F'') and simultaneously applying the same to said information signal input (X2) of said second QUATANT device (Q2), and means (11) for delivering a same reference frequency ( theta ) Simultaneously to both said reference signal inputs (Y1, Y2), and simultaneous with the application to said information signal inputs (X1, X2) of the respective signals (f'', F''), whereby said distortion is eliminated.
Claim 3
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said reference frequency delivering means comprises a clock.
Claim 4
Dependent Claim
18 words
An apparatus as claimed in claim 1, wherein said support is a magnetic tape having two recording tracks.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |