US3716780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the accurate reproduction of pulse code modulation signals received as an unfavourable signal-to-noise ratio
Assignee: US Philips Corp
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Filing: 1971-04-05
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Granted: 1973-02-13
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Expires: 1991-04-05
Abstract
Abstract A SYSTEM FOR THE ACCURATE REPRODUCTION OF PULSE CODE MODULATION SIGNALS RECEIVED AT AN UNFAVOURABLE SIGNALTO-NOISE RATIO, COMPRISING TWO SIGNAL INTERGRATORS CONTROLLED BY CLOCK PULSES AND A DETECTION CIRCUIT CONNECTED THERETO, WHICH TOGETHER FORM PART OF A FIRST CONTROL LOOP FOR PHASE READJUSTMENT OF THE CLOCK PULSE GENERATOR AND A SECOND CONTROL LOOP FOR RENDERING THE REFERENCE LEVEL REQUIRED FOR DETECTION OF THE TRANSITIONS AND THE DIRECT VOLTAGE LEVEL OF THE INCOMING SIGNAL EQUAL TO EACH OTHER.
Inventors
- 👤 Der Lee D Van
- 👤 A Morrien
- 👤 J Gijsbert
- 👤 Elk C Van
- 👤 J Raatgever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:05
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/06
Claims Analysis
Total Claims: 0
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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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |