US3087109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuits
Assignee: McGraw Edison Co
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Filing: 1959-11-10
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Granted: 1963-04-23
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Expires: 1979-11-10
Abstract
No abstract record available.
Inventors
- 👤 Bowers Melville Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:52
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CIRCUIT FOR DERIVING A REFERENCE VOLTAGE INDEPENDENT OF TEMPERATURE VARIATIONS AND INCLUDING A PAIR OF INPUT TERMINALS CONNECTED TO A VOLTAGE SOURCE, A ZENER DIODE AND A FIRST RESISTANCE MEANS SERIES CONNECTED ACROSS SAID INPUT TERMINALS, A SECOND RESISTANCE MEANS CONNECTED AT ONE END TO ONE TERMINAL OF SAID ZENER DIODE, A THIRD RESISTANCE MEANS CONNECTED BETWEEN THE OTHER END OF SAID SECOND RESISTANCE MEANS AND THE OTHER TERMINAL OF SAID ZENER DIODE, SAID SECOND RESISTANCE MEANS HAVING A POSITIVE TEMPERATURE COEFFICIENT, SAID THIRD RESISTANCE MEANS HAVING A ZERO TEMPERATURE CO-EFFICIENT, WHEREBY A REFERENCE VOLTAGE WILL BE DERIVED ACROSS SAID THIRD RESISTANCE MEANS THAT IS INDEPENDENT OF TEMPERATURE VARIATIONS.
Claim 2
Dependent Claim
110 words
A CIRCUIT FOR DERIVING A REFERENCE VOLTAGE INDEPENDENT OF TEMPERATURE VARIATIONS AND INCLUDING A PAIR OF INPUT TERMINALS CONNECTED TO A VOLTAGE SOURCE, A ZENER DIODE AND A FIRST RESISTANCE MEANS SERIES CONNECTED ACROSS SAID INPUT TERMINALS, A SECOND RESISTANCE MEANS CONNECTED AT ONE END TO ONE TERMINAL OF SAID ZENER DIODE, A THIRD RESISTANCE MEANS CONNECTED BETWEEN THE OTHER END OF SAID SECOND RESISTANCE MEANS AND THE OTHER TERMINAL OF SAID ZENER DIODE, SAID SECOND RESISTANCE MEANS HAVING A POSITIVE TEMPERATURE COEFFICIENT, SAID THIRD RESISTANCE MEANS HAVING A ZERO TEMPERATURE CO-EFFICIENT, WHEREBY A REFERENCE VOLTAGE WILL BE DERIVED ACROSS SAID THIRD RESISTANCE MEANS THAT IS INDEPENDENT OF TEMPERATURE VARIATIONS.
References Cited (Backward Citations)
US2293045A
Cited
US2864053A
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 |