Patent US3171983A successfully refreshed from Google Patents.
US3171983A
Expired / Lapsed
US
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Time delay circuit employing minority carrier storage diode to effect delay
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1962-10-01
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Granted: 1965-03-02
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 John J Hickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:33
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A DELAY CIRCUIT, COMPRISING: A SERIES CIRCUIT INCLUDING A SEMICONDUCTOR DIODE CAPABLE OF STORING CARRIERS, A NORMALLY CLOSED SWITCHING DEVICE AND MEANS FOR CAUSING CURRENT OF PREDETERMINED MAGNITUDE TO FLOW THROUGH SAID SEMICONDUCTOR DIODE IN THE FORWARD DIRECTION TO INJECT CARRIERS THEREIN; FIRST CIRCUIT MEANS COUPLED TO SAID SWITCHING DEVICE FOR APPLYING AN INPUT PULSE THERETO TO INTERRUPT THE FLOW OF CURRENT THROUGH SAID DIODE, THEREBY LEAVING A PREDETERMINED AMOUNT OF STORED CHARGE IN SAID DIODE; SECOND CIRCUIT MEANS FOR COUPLING SAID INPUT PULSE TO SAID DIODE TO CAUSE CURRENT TO FLOW THROUGH SAID DIODE IN THE REVERSE DIRECTION, THEREBY TO DEPLETE THE CHARGE PREVIOUSLY STORED THEREIN; AN OUTPUT CIRCUIT MEANS COUPLED TO SAID DIODE FOR RECEIVING THE OUTPUT VOLTAGE GENERATED THEREACROSS UPON DEPLETION OF THE STORED CHARGE.
Claim 2
Dependent Claim
128 words
A DELAY CIRCUIT, COMPRISING: A SERIES CIRCUIT INCLUDING A SEMICONDUCTOR DIODE CAPABLE OF STORING CARRIERS, A NORMALLY CLOSED SWITCHING DEVICE AND MEANS FOR CAUSING CURRENT OF PREDETERMINED MAGNITUDE TO FLOW THROUGH SAID SEMICONDUCTOR DIODE IN THE FORWARD DIRECTION TO INJECT CARRIERS THEREIN; FIRST CIRCUIT MEANS COUPLED TO SAID SWITCHING DEVICE FOR APPLYING AN INPUT PULSE THERETO TO INTERRUPT THE FLOW OF CURRENT THROUGH SAID DIODE, THEREBY LEAVING A PREDETERMINED AMOUNT OF STORED CHARGE IN SAID DIODE; SECOND CIRCUIT MEANS FOR COUPLING SAID INPUT PULSE TO SAID DIODE TO CAUSE CURRENT TO FLOW THROUGH SAID DIODE IN THE REVERSE DIRECTION, THEREBY TO DEPLETE THE CHARGE PREVIOUSLY STORED THEREIN; AN OUTPUT CIRCUIT MEANS COUPLED TO SAID DIODE FOR RECEIVING THE OUTPUT VOLTAGE GENERATED THEREACROSS UPON DEPLETION OF THE STORED CHARGE.
References Cited (Backward Citations)
US3050640A
Cited
US3091705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |