US3156833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sense circuits employing tunnel diodes or the like
Assignee: International Business Machines Corp
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Filing: 1962-08-15
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Granted: 1964-11-10
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Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 Harley A Cloud
- 👤 Paul B Flagg
- 👤 William K Mead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:03
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A SENSE CIRCUIT FOR SENSING AND PROVIDING OUTPUT SIGNALS INDICATING THE PRESENCE AND ABSENCE OF INPUT SIGNALS FROM AN INPUT CIRCUIT COMPRISING: FIRST AND SECOND POLYSTABLE STAGES; EACH OF SAID STAGES COMPRISING A PAIR OF BISTABLE DEVICES CONNECTED IN SERIES AND HAVING A NODE THEREBETWEEN; MEANS CONNECTING EACH OF THE NODES TO SAID INPUT CIRCUIT; OUTPUT MEANS CONNECTED WITH SAID NODES; EACH OF SAID STAGES HAVING AT LEAST TWO STABLE STATES CHARACTERIZED BY INVERSELY RELATED SIGNALS AT THE NODE THEREOF; BOTH OF SAID STAGES BEING IN THE SAME STATE IN THE ABSENCE OF INPUT SIGNALS SO THAT SIGNALS OF THE SAME POLARITY ARE SUPPLIED TO SAID OUTPUT MEANS; AND AN INPUT SIGNAL HAVING AT LEAST A PRESELECTED VALUE CAUSING ONE OF SAID STAGES TO CHANGE STATE TO PROVIDE SIGNALS OF OPPOSITE POLARITY TO SAID OUTPUT MEANS.
Claim 2
Dependent Claim
136 words
A SENSE CIRCUIT FOR SENSING AND PROVIDING OUTPUT SIGNALS INDICATING THE PRESENCE AND ABSENCE OF INPUT SIGNALS FROM AN INPUT CIRCUIT COMPRISING: FIRST AND SECOND POLYSTABLE STAGES; EACH OF SAID STAGES COMPRISING A PAIR OF BISTABLE DEVICES CONNECTED IN SERIES AND HAVING A NODE THEREBETWEEN; MEANS CONNECTING EACH OF THE NODES TO SAID INPUT CIRCUIT; OUTPUT MEANS CONNECTED WITH SAID NODES; EACH OF SAID STAGES HAVING AT LEAST TWO STABLE STATES CHARACTERIZED BY INVERSELY RELATED SIGNALS AT THE NODE THEREOF; BOTH OF SAID STAGES BEING IN THE SAME STATE IN THE ABSENCE OF INPUT SIGNALS SO THAT SIGNALS OF THE SAME POLARITY ARE SUPPLIED TO SAID OUTPUT MEANS; AND AN INPUT SIGNAL HAVING AT LEAST A PRESELECTED VALUE CAUSING ONE OF SAID STAGES TO CHANGE STATE TO PROVIDE SIGNALS OF OPPOSITE POLARITY TO SAID OUTPUT MEANS.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |