US3197690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal translating circuit for providing isolation between d.c. source and load
Assignee: North American Aviation Corp
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Filing: 1963-03-01
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Granted: 1965-07-27
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gary E Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A DIRECT CURRENT ISOLATING CIRCUIT FOR TRANSLATING AN ALTERNATING CURRENT SIGNAL FROM A SOURCE TO A LOAD COMPRISING A CAPACITOR, FIRST MEANS COUPLING SAID CAPACITOR TO SAID SOURCE FOR CHARGING SAID CAPACITOR, SAID MEANS INCLUDING A DIODE HAVING ONE TERMINAL CONNECTED TO A FIRST SIDE OF SAID CAPACITOR, SECOND MEANS COUPLING SAID CAPACITOR TO SAID LOAD FOR DISCHARGING SAID CAPACITOR, SAID SECOND MEANS INCLUDING A FIRST TRANSISTOR CONNECTING A JUNCTION BETWEEN SAID DIODE AND CAPACITOR ON ONE SIDE OF SAID CAPACITOR TO SAID LOAD, AND AN IMPEDANCE ELEMENT CONNECTED IN SERIES TO THE OTHER SIDE OF SAID CAPACITOR FOR RETURN OF DISCHARGE CURRENT THROUGH THE LOAD, AND THIRD MEANS CONNECTING SAID DIODE IN PARALLEL WITH THE EMITTER-BASE JUNCTION OF SAID TRANSISTOR, SAID DIODE BEING POLED FOR CONDUCTION OPPOSITE TO CONDUCTION THROUGH SAID EMITTER-BASE JUNCTION, WHEREBY SAID TRANSISTOR IS RENDERED NON-CONDUCTIVE WHILE SAID CAPACITOR IS CHARGING THROUGH SAID DIODE.
Claim 2
Dependent Claim
148 words
A DIRECT CURRENT ISOLATING CIRCUIT FOR TRANSLATING AN ALTERNATING CURRENT SIGNAL FROM A SOURCE TO A LOAD COMPRISING A CAPACITOR, FIRST MEANS COUPLING SAID CAPACITOR TO SAID SOURCE FOR CHARGING SAID CAPACITOR, SAID MEANS INCLUDING A DIODE HAVING ONE TERMINAL CONNECTED TO A FIRST SIDE OF SAID CAPACITOR, SECOND MEANS COUPLING SAID CAPACITOR TO SAID LOAD FOR DISCHARGING SAID CAPACITOR, SAID SECOND MEANS INCLUDING A FIRST TRANSISTOR CONNECTING A JUNCTION BETWEEN SAID DIODE AND CAPACITOR ON ONE SIDE OF SAID CAPACITOR TO SAID LOAD, AND AN IMPEDANCE ELEMENT CONNECTED IN SERIES TO THE OTHER SIDE OF SAID CAPACITOR FOR RETURN OF DISCHARGE CURRENT THROUGH THE LOAD, AND THIRD MEANS CONNECTING SAID DIODE IN PARALLEL WITH THE EMITTER-BASE JUNCTION OF SAID TRANSISTOR, SAID DIODE BEING POLED FOR CONDUCTION OPPOSITE TO CONDUCTION THROUGH SAID EMITTER-BASE JUNCTION, WHEREBY SAID TRANSISTOR IS RENDERED NON-CONDUCTIVE WHILE SAID CAPACITOR IS CHARGING THROUGH SAID DIODE.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |