US3087150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-to-digital encoder
Assignee: AT&T Inc
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Filing: 1960-09-14
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Granted: 1963-04-23
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Expires: 1980-09-14
Abstract
No abstract record available.
Inventors
- 👤 Dennis B James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN COMBINATION IN A SYSTEM FOR ENCODING AN ANALOG SIGNAL INTO A DIGITAL REPRESENTATION THEREOF, N STAGES INCLUDING JUST N VOLTAGE-CONTROLLED NEGATIVE RESISTANCE DIODES, MEANS FOR BIASING SAID DIODES IN THEIR RELATIVELY LOW VOLTAGE STATES FOR BISTABLE OPERATION, MEANS FOR SUCCESSIVELY SWITCHING SAID DIODES FROM THEIR RELATIVELY LOW TO THEIR RELATIVELY HIGH VOLTAGE STATES, CIRCUIT MEANS RESPONSIVE TO THE ANALOG SIGNAL TO BE ENCODED AND TO A SIGNAL REPRESENTATIVE OF THE SUCCESSIVE SWITCHINGS OF SAID DIODES FOR PROVIDING A FEEDBACK SIGNAL ONLY WHEN THE TOTAL SIGNAL CURRENT REPRESENTATIVE OF THE SWITCHING OF SAID N DIODES IS GREATER THAN THE CURRENT DERIVED FROM THE ANALOG SIGNAL, AND MEANS RESPONSIVE TO SAID FEEDBACK SIGNALS FOR SWITCHING BACK TO THEIR RELATIVELY LOW VOLTAGE STATES THE ONES OF SAID N DIODES WHOSE SWITCHING CAUSED THE TOTAL SIGNAL CURRENT REPRESENTATIVE OF THE SWITCHING OF SAID N DIODES TO BE GREATER THAN THE ANALOG SIGNAL CURRENT.
Claim 2
Dependent Claim
150 words
IN COMBINATION IN A SYSTEM FOR ENCODING AN ANALOG SIGNAL INTO A DIGITAL REPRESENTATION THEREOF, N STAGES INCLUDING JUST N VOLTAGE-CONTROLLED NEGATIVE RESISTANCE DIODES, MEANS FOR BIASING SAID DIODES IN THEIR RELATIVELY LOW VOLTAGE STATES FOR BISTABLE OPERATION, MEANS FOR SUCCESSIVELY SWITCHING SAID DIODES FROM THEIR RELATIVELY LOW TO THEIR RELATIVELY HIGH VOLTAGE STATES, CIRCUIT MEANS RESPONSIVE TO THE ANALOG SIGNAL TO BE ENCODED AND TO A SIGNAL REPRESENTATIVE OF THE SUCCESSIVE SWITCHINGS OF SAID DIODES FOR PROVIDING A FEEDBACK SIGNAL ONLY WHEN THE TOTAL SIGNAL CURRENT REPRESENTATIVE OF THE SWITCHING OF SAID N DIODES IS GREATER THAN THE CURRENT DERIVED FROM THE ANALOG SIGNAL, AND MEANS RESPONSIVE TO SAID FEEDBACK SIGNALS FOR SWITCHING BACK TO THEIR RELATIVELY LOW VOLTAGE STATES THE ONES OF SAID N DIODES WHOSE SWITCHING CAUSED THE TOTAL SIGNAL CURRENT REPRESENTATIVE OF THE SWITCHING OF SAID N DIODES TO BE GREATER THAN THE ANALOG SIGNAL CURRENT.
References Cited (Backward Citations)
US2970309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |