Patent US3191151A successfully refreshed from Google Patents.
US3191151A
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Programmable circuit
Assignee: Fairchild Semiconductor Corp
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Filing: 1962-11-26
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Granted: 1965-06-22
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 John E Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/06; G11C17/14; G11C17/16; Y; Y10; Y10S; Y10S148/00; Y10S148/055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROGRAMMABLE CIRCUIT MATRIX HAVING A PLURALITY OF INPUT AND OUTPUT TERMINALS, EACH INPUT TERMINAL CONNECTED TO EACH OUTPUT TERMINAL THROUGH A DIFFERENT PAIR OF BACK-TO-BACK SEMICONDUCTOR DIODES, EACH OF SAID DIODES HAVING TWO ADJACENT REGIONS OF THE OPPOSITE CONDUCTIVITY TYPE WITH A PN JUNCTION THEREBETWEEN , SAID PN JUNCTION BEING CAPABLE OF BEING PERMANENTLY DESTROYED, LEAVING ESSENTIALLY A SHORT CIRCUIT ACROSS ITS PREVIOUS UNIDIRECTIONAL CURRENT PATH IN RESPONSE TO A CURRENT PULSE OF PRESELECTED MAGNITUDE IN THE REVERSE DIRECTION ACROSS SAID JUNCTION, ONE OF THE REGIONS OF ONE DIODE OF EACH PAIR BEING CONNECTED TO THE REGION OF THE OTHER DIODE OF SAID PAIR OF THE SAME CONDUCTIVITY TYPE.
Claim 2
Dependent Claim
110 words
A PROGRAMMABLE CIRCUIT MATRIX HAVING A PLURALITY OF INPUT AND OUTPUT TERMINALS, EACH INPUT TERMINAL CONNECTED TO EACH OUTPUT TERMINAL THROUGH A DIFFERENT PAIR OF BACK-TO-BACK SEMICONDUCTOR DIODES, EACH OF SAID DIODES HAVING TWO ADJACENT REGIONS OF THE OPPOSITE CONDUCTIVITY TYPE WITH A PN JUNCTION THEREBETWEEN , SAID PN JUNCTION BEING CAPABLE OF BEING PERMANENTLY DESTROYED, LEAVING ESSENTIALLY A SHORT CIRCUIT ACROSS ITS PREVIOUS UNIDIRECTIONAL CURRENT PATH IN RESPONSE TO A CURRENT PULSE OF PRESELECTED MAGNITUDE IN THE REVERSE DIRECTION ACROSS SAID JUNCTION, ONE OF THE REGIONS OF ONE DIODE OF EACH PAIR BEING CONNECTED TO THE REGION OF THE OTHER DIODE OF SAID PAIR OF THE SAME CONDUCTIVITY TYPE.
References Cited (Backward Citations)
US2784389A
Cited
US2961593A
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US2972096A
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US3028659A
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US3098160A
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US3040191A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |