Patent US3564413A successfully refreshed from Google Patents.
US3564413A
Expired / Lapsed
US
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Area quantization delta modulation system
Assignee: Panasonic Holdings Corp
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Filing: 1967-03-20
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Granted: 1971-02-16
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Expires: 1987-03-20
Abstract
Abstract THERE IS DISCLOSED A MODULATION SYSTEM BASED ON A FUNDAMENTAL IDEA THAT THE SYSTEM PRODUCES A POSITIVE OR NEGATIVE OUTPUT PULSE WHEN AN AREA DEFINED BY THE TIME AXIS AND THE INCREMENT OF INPUT SIGNAL VOLTAGE AFTER OCCURRENCE OF THE PRECEDING OUTPUT PULSE FROM THE SYSTEM REACES A PREDETERMINED POSITIVE OR NEGATIVE AMOUNT. THIS SYSTEM IS CONSTITUTED TO FEATURE LESS NUMBER OF OUTPUT PULSES, HIGH IMMUNITY AGAINST INTERFERING PULSES AND LONGER PULSE INTERVALS, SO THAT IT CAN BE USED FOR THE PRIMARY MODULATION IN AN ASYNCHRONOUS MULTIPLEX SYSTEM LIKE RADA.
Inventors
- 👤 Kosaku Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:03
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |