Patent US3238310A successfully refreshed from Google Patents.
US3238310A
Expired / Lapsed
US
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Bidirectional amplifiers
Assignee: RCA Corp
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Filing: 1961-02-13
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Granted: 1966-03-01
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 George H Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:56
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE COMBINATION, COMPRISING: A TWO-WAY TRANSMISSION PATH AT EITHER END PORTION OF WHICH A SIGNAL MAY BE APPLIED FOR TRANSMISSION ALONG THE PATH TO THE OPPOSITE END OF THE PATH; AND A BIDIRECTIONAL AMPLIFIER IN SAID PATH FOR AMPLIFYING THE SIGNAL PASSING IN EITHER DIRECTION ALONG THE PATH COMPRISING: A PAIR OF ACTIVE AMPLIFIER ELEMENTS, EACH INCLUDING THREE ELECTRODES, NAMELY A CONTROL ELECTRODE, A CHARGE CARRIER EMITTING ELECTRODE AND A CHARGE CARRIER COLLECTING ELECTRODE; A BIDIRECTIONAL DIRECT-CURRENT CONNECTION BETWEEN THE EMITTING ELECTRODE OF EACH ACTIVE ELEMENT AND THE CONTROL ELECTRODE OF THE OTHER ACTIVE ELEMENT; A TERMINAL AT EACH DIRECT-CURRENT CONNECTION, ONE FOR RECEIVING AN INPUT SIGNAL PROPAGATING ALONG SAID PATH IN ONE DIRECTION AND THE OTHER FOR RERECEIVING AN INPUT SIGNAL PROPAGATING ALONG SAID PATH IN THE OPPOSITE DIRECTION, EACH TERMINAL FOR PRODUCING AN OUTPUT SIGNAL WHEN THE OTHER TERMINAL RECEIVES AN INPUT SIGNAL; AND MEANS COUPLED TO EACH ELEMENT FOR SUPPLYING AN OPERATING VOLTAGE TO EACH ELEMENT.
Claim 2
Dependent Claim
159 words
THE COMBINATION, COMPRISING: A TWO-WAY TRANSMISSION PATH AT EITHER END PORTION OF WHICH A SIGNAL MAY BE APPLIED FOR TRANSMISSION ALONG THE PATH TO THE OPPOSITE END OF THE PATH; AND A BIDIRECTIONAL AMPLIFIER IN SAID PATH FOR AMPLIFYING THE SIGNAL PASSING IN EITHER DIRECTION ALONG THE PATH COMPRISING: A PAIR OF ACTIVE AMPLIFIER ELEMENTS, EACH INCLUDING THREE ELECTRODES, NAMELY A CONTROL ELECTRODE, A CHARGE CARRIER EMITTING ELECTRODE AND A CHARGE CARRIER COLLECTING ELECTRODE; A BIDIRECTIONAL DIRECT-CURRENT CONNECTION BETWEEN THE EMITTING ELECTRODE OF EACH ACTIVE ELEMENT AND THE CONTROL ELECTRODE OF THE OTHER ACTIVE ELEMENT; A TERMINAL AT EACH DIRECT-CURRENT CONNECTION, ONE FOR RECEIVING AN INPUT SIGNAL PROPAGATING ALONG SAID PATH IN ONE DIRECTION AND THE OTHER FOR RERECEIVING AN INPUT SIGNAL PROPAGATING ALONG SAID PATH IN THE OPPOSITE DIRECTION, EACH TERMINAL FOR PRODUCING AN OUTPUT SIGNAL WHEN THE OTHER TERMINAL RECEIVES AN INPUT SIGNAL; AND MEANS COUPLED TO EACH ELEMENT FOR SUPPLYING AN OPERATING VOLTAGE TO EACH ELEMENT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |