US3219910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon controlled rectifier circuit
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1960-10-31
•
Granted: 1965-11-23
•
Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Robert G Klimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:22
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN A CIRCUIT INCLUDING A SILICON CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, A SERIES CIRCUIT INCLUDING A LOAD AND THE CATHODE-ANODE PATH OF SAID RECTIFIER, MEANS OPERATIVE DURING CERTAIN TIME INTERVALS FOR CYCLICALLY PLACING SAID CATHODE AT A POSITIVE POTENTIAL RELATIVE TO SAID ANODE TO PREVENT CONDUCTION THROUGH SAID RECTIFIER, MEANS CONECTED TO SAID SERIES CIRCUIT TO APPLY A VOLTAGE OF SUCH POLARITY AS TO PLACE SAID ANODE AT A POSITIVE POTENTIAL RELATIVE TO SAID CATHODE DURING ALTERNATE TIME INTERVALS, MEANS CONNECTED IN CIRCUIT WITH SAID CATHODE AND SAID GATE ELECTRODE FOR APPLYING POSITIVE PULSES TO SAID GATE ELECTRODE AT A CERTAIN TIME DURING EACH OF SAID ALTERNATE TIME INTERVALS TO RENDER SAID RECTIFIER CONDUCTIVE, AND MEANS CONNECTED IN CIRCUIT WITH SAID CATHODE AND SAID GATE ELECTRODE TO PROVIDE A HIGH IMPEDANCE WITH RESPECT TO SAID PULSES WHILE PROVIDING A LOW DIRECT CURRENT RESISTANCE TO INCREASE THE BREAKOVER VOLTAGE OF SAID RECTIFIER.
Claim 2
Dependent Claim
157 words
IN A CIRCUIT INCLUDING A SILICON CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, A SERIES CIRCUIT INCLUDING A LOAD AND THE CATHODE-ANODE PATH OF SAID RECTIFIER, MEANS OPERATIVE DURING CERTAIN TIME INTERVALS FOR CYCLICALLY PLACING SAID CATHODE AT A POSITIVE POTENTIAL RELATIVE TO SAID ANODE TO PREVENT CONDUCTION THROUGH SAID RECTIFIER, MEANS CONECTED TO SAID SERIES CIRCUIT TO APPLY A VOLTAGE OF SUCH POLARITY AS TO PLACE SAID ANODE AT A POSITIVE POTENTIAL RELATIVE TO SAID CATHODE DURING ALTERNATE TIME INTERVALS, MEANS CONNECTED IN CIRCUIT WITH SAID CATHODE AND SAID GATE ELECTRODE FOR APPLYING POSITIVE PULSES TO SAID GATE ELECTRODE AT A CERTAIN TIME DURING EACH OF SAID ALTERNATE TIME INTERVALS TO RENDER SAID RECTIFIER CONDUCTIVE, AND MEANS CONNECTED IN CIRCUIT WITH SAID CATHODE AND SAID GATE ELECTRODE TO PROVIDE A HIGH IMPEDANCE WITH RESPECT TO SAID PULSES WHILE PROVIDING A LOW DIRECT CURRENT RESISTANCE TO INCREASE THE BREAKOVER VOLTAGE OF SAID RECTIFIER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |