Patent US3271660A successfully refreshed from Google Patents.
US3271660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference voltage source
Assignee: Fairchild Semiconductor Corp
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Filing: 1963-03-28
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Granted: 1966-09-06
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 David F Hilbiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G05F3/222; G05F3/225; H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A REFERENCE VOLTAGE GENERATOR COMPRISING FIRST AND SECOND NPN TRANSISTORS, OUTPUT TERMINALS RESPECTIVELY CONNECTED TO THE BASES OF SAID TRANSISTORS, ONE OF SAID TERMINALS CONNECTED TO GROUND, FIRST AND SECOND PLURALITIES OF SEMICONDUCTOR DIODE DEVICES RESPECTIVELY CONNECTED IN SERIES WITH THE EMITTERS OF SAID FIRST AND SECOND TRANSISTORS, MEANS APPLYING POSITIVE POTENTIAL BIAS TO THE COLLECTORS OF SAID TRANSISTORS, FIRST AND SECOND NPN TRANSISTORS HAVING THEIR BASES RESPECTIVELY CONNECTED TO THE COLLECTORS OF SAID FIRST AND SECOND NPN TRANSISTORS, MEANS APPLYING NEGATIVE POTENTIAL BIAS TO THE COLLECTOR SAID FIRST PNP TRANSISTOR, A BREAKDOWN DIODE HAVING ITS POSITIVE TERMINAL COMMONLY CONNECTED TO THE EMITTERS OF SAID FIRST AND SECOND PNP TRANSISTORS, MEANS APPLYING POSITIVE POTENTIAL BIAS TO THE NEGATIVE TERMINAL OF SAID BREAKDOWN DIODE, A PAIR OF FEEDBACK RESISTORS SERIES CONNECTED BETWEEN THE COLLECTOR OF SAID SECOND PNP TRANSISTOR AND A SOURCE OF NEGATIVE POTENTIAL BIAS, A THIRD NPN TRANSISTOR HAVING ITS BASE CONNECTED TO THE COLLECTOR OF SAID FIRST PNP TRAN-
Claim 2
Dependent Claim
161 words
A REFERENCE VOLTAGE GENERATOR COMPRISING FIRST AND SECOND NPN TRANSISTORS, OUTPUT TERMINALS RESPECTIVELY CONNECTED TO THE BASES OF SAID TRANSISTORS, ONE OF SAID TERMINALS CONNECTED TO GROUND, FIRST AND SECOND PLURALITIES OF SEMICONDUCTOR DIODE DEVICES RESPECTIVELY CONNECTED IN SERIES WITH THE EMITTERS OF SAID FIRST AND SECOND TRANSISTORS, MEANS APPLYING POSITIVE POTENTIAL BIAS TO THE COLLECTORS OF SAID TRANSISTORS, FIRST AND SECOND NPN TRANSISTORS HAVING THEIR BASES RESPECTIVELY CONNECTED TO THE COLLECTORS OF SAID FIRST AND SECOND NPN TRANSISTORS, MEANS APPLYING NEGATIVE POTENTIAL BIAS TO THE COLLECTOR SAID FIRST PNP TRANSISTOR, A BREAKDOWN DIODE HAVING ITS POSITIVE TERMINAL COMMONLY CONNECTED TO THE EMITTERS OF SAID FIRST AND SECOND PNP TRANSISTORS, MEANS APPLYING POSITIVE POTENTIAL BIAS TO THE NEGATIVE TERMINAL OF SAID BREAKDOWN DIODE, A PAIR OF FEEDBACK RESISTORS SERIES CONNECTED BETWEEN THE COLLECTOR OF SAID SECOND PNP TRANSISTOR AND A SOURCE OF NEGATIVE POTENTIAL BIAS, A THIRD NPN TRANSISTOR HAVING ITS BASE CONNECTED TO THE COLLECTOR OF SAID FIRST PNP TRAN-
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |