US3716803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized delta modulator
Assignee: AT&T Inc
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Filing: 1971-12-27
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Granted: 1973-02-13
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Expires: 1991-12-27
Abstract
Abstract IN DELTA MODULATORS, ESPECIALLY THOSE KNOWN AS ADAPTIVE DELTA MODULATORS, NUMEROUS FACTORS SUCH AS NOISE, DELAY, DECISION CIRCUIT HYSTERESIS, AND POOR ADAPTIVE ALGORITHMS CAN RESULT IN INSTABILITIES IN THE FORM OF LOW FREQUENCY, HIGH AMPLITUDE OSCILLATIONS. INSTABILITIES CAN BE ELIMINATED THROUGH MEANS FOR PRODUCING AN OVERSHOOT IN THE INTEGRATOR OUTPUT, AND ACTUATING THE DECISION CIRCUIT WHILE THE OVERSHOOT IS PRESENT.
Inventors
- 👤 J Candy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
H; H03; H03M; H03M3/00; H03M3/02; H03M3/022
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 |