Patent US1644378A successfully refreshed from Google Patents.
Patent US3249870A successfully refreshed from Google Patents.
US3249870A
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Delta modulation signal transmission system
Assignee: US Philips Corp
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Filing: 1962-06-06
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Granted: 1966-05-03
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Expires: 1982-06-06
Abstract
No abstract record available.
Inventors
- 👤 Greefkes Johannes Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
H; H03; H03M; H03M3/00; H03M3/02; H04; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A RECEIVER FOR RECEIVING DELTA PULSE CODE MODULATION SIGNALS OF THE TYPE IN WHICH THE AVERAGE DENSITY OF TRANSMITTED PULSES IS PROPORTIONAL TO THE LEVEL OF NPUT SIGNALS AND THE PRESENCE OR ABSENCE OF CODE PULSES IS A FUNCTION OF THE INSTANTANEOUS COURSE OF SAID INPUT SIGNALS, SAID RECEIVER COMPRISING MEANS FOR RECEIVING SAID PULSE CODE MODULATION SIGNALS, LOW-PASS FILTER MEANS FOR PROVIDING A DIRECT VOLTAGE THAT IS A FUNCTION OF SAID AVERAGE DENSITY, AND MEANS FOR MODULATING THE ENERGY CONTENT OF SAID PULSE CODE MODULATION SIGNALS WITH SAID DIRECT VOLTAGE, MEANS FOR INTEGRATING THE OUTPUT OF SAID MODULATING MEANS, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUT OF SAID INTEGRATING MEANS.
Claim 2
Dependent Claim
112 words
A RECEIVER FOR RECEIVING DELTA PULSE CODE MODULATION SIGNALS OF THE TYPE IN WHICH THE AVERAGE DENSITY OF TRANSMITTED PULSES IS PROPORTIONAL TO THE LEVEL OF NPUT SIGNALS AND THE PRESENCE OR ABSENCE OF CODE PULSES IS A FUNCTION OF THE INSTANTANEOUS COURSE OF SAID INPUT SIGNALS, SAID RECEIVER COMPRISING MEANS FOR RECEIVING SAID PULSE CODE MODULATION SIGNALS, LOW-PASS FILTER MEANS FOR PROVIDING A DIRECT VOLTAGE THAT IS A FUNCTION OF SAID AVERAGE DENSITY, AND MEANS FOR MODULATING THE ENERGY CONTENT OF SAID PULSE CODE MODULATION SIGNALS WITH SAID DIRECT VOLTAGE, MEANS FOR INTEGRATING THE OUTPUT OF SAID MODULATING MEANS, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUT OF SAID INTEGRATING MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |