Patent US3334311A successfully refreshed from Google Patents.
US3334311A
Expired / Lapsed
US
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Adjustable-frequency astable multivibrator
Assignee: Fairchild Semiconductor Corp
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Filing: 1966-03-24
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Granted: 1967-08-01
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Expires: 1986-03-24
Abstract
No abstract record available.
Inventors
- 👤 David T Kan
- 👤 Julius G Rakonitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:28
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2826; H03K3/2828
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN ASTABLE MULTIVIBRATOR HAVING A SUBSTANTIALY LINEAR VOLTAGE-FREQUENCY CHARACTERISTIC OVER A WIDE RANGE OF FREQUENCIES COMPRISING: A STORAGE CAPACITOR; A VARIABLE-VOLTAGE INPUT CIRCUIT CONNECTED ACROSS SAID CAPACITOR TO CHARGE THE SAME; A DISCHARGE CIRCUIT FOR SAID CAPACITOR INCLUDING IN SERIES A LOAD RESISTOR AND A NORMALLY NONCONDUCTIVE FIRST ELECTRONIC VALVE HAVING A CONDUCTIVITY-CONTROLLING ELECTRODE; A VOLTAGE-REPONSIVE UNILATERALLY CONDUCTIVE DEVICE AND A SECOND ELECTRONIC VALVE CONNECTED IN SERIES BETWEEN THE HIGH-POTENTIAL TERMINAL OF SAID CAPACITOR AND SAID ELECTRODE, SAID SECOND ELECTRONIC VALVE HAVING A CONDUCTIVITY-CONTROLLING ELECTRODE; AND MEANS INDEPENDENT OF SAID INPUT CIRCUIT FOR BIASING SAID CONDUCTIVITY-CONTROLLING ELECTRODE OF SAID SECOND ELECTRONIC VALVE AND SAID DEVICE TO A NONCONDUCTIVE STATE UNTIL THE CHARGE ON SAID CAPACITOR REACHES A PREDETERMINED VALUE, WHEREUPON SAID DEVICE AND SAID FIRST VALVE BECOME CONDUCTIVE TO DISCHARGE SAID CAPACITOR.
Claim 2
Dependent Claim
132 words
AN ASTABLE MULTIVIBRATOR HAVING A SUBSTANTIALY LINEAR VOLTAGE-FREQUENCY CHARACTERISTIC OVER A WIDE RANGE OF FREQUENCIES COMPRISING: A STORAGE CAPACITOR; A VARIABLE-VOLTAGE INPUT CIRCUIT CONNECTED ACROSS SAID CAPACITOR TO CHARGE THE SAME; A DISCHARGE CIRCUIT FOR SAID CAPACITOR INCLUDING IN SERIES A LOAD RESISTOR AND A NORMALLY NONCONDUCTIVE FIRST ELECTRONIC VALVE HAVING A CONDUCTIVITY-CONTROLLING ELECTRODE; A VOLTAGE-REPONSIVE UNILATERALLY CONDUCTIVE DEVICE AND A SECOND ELECTRONIC VALVE CONNECTED IN SERIES BETWEEN THE HIGH-POTENTIAL TERMINAL OF SAID CAPACITOR AND SAID ELECTRODE, SAID SECOND ELECTRONIC VALVE HAVING A CONDUCTIVITY-CONTROLLING ELECTRODE; AND MEANS INDEPENDENT OF SAID INPUT CIRCUIT FOR BIASING SAID CONDUCTIVITY-CONTROLLING ELECTRODE OF SAID SECOND ELECTRONIC VALVE AND SAID DEVICE TO A NONCONDUCTIVE STATE UNTIL THE CHARGE ON SAID CAPACITOR REACHES A PREDETERMINED VALUE, WHEREUPON SAID DEVICE AND SAID FIRST VALVE BECOME CONDUCTIVE TO DISCHARGE SAID CAPACITOR.
References Cited (Backward Citations)
US3229225A
Cited
US3287975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |