Patent US3238472A successfully refreshed from Google Patents.
US3238472A
Expired / Lapsed
US
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Double sideband modulator circuit transmitting suppressed carrier or partial carriersignals
Assignee: Telephone and Electrical Inddustries Pty Ltd
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Filing: 1963-04-02
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Granted: 1966-03-01
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Crompton-Couvela Denys Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:52
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CARRIER FREQUENCY MODULATION SYSTEM COMPRISING, IN COMBINATION, MEANS WHEREIN A CARRIER SIGNAL IS FED TO A HYBRID NETWORK WHICH SPLITS THE SIGNAL ALONG TWO ROUTES, ONE OF SAID ROUTES PASSING THROUGH TWO DIODES IN PARALLEL, EACH OF SAID DIODES HAVING ITS CATHODE INTERCONNECTED TO THE ANODE OF THE OTHER BY ANOTHER DIODE POLED FOR CONDUCTION FROM SAID CATHODES TO SAID ANODES, RESPECTIVELY, AND THE OTHER OF SAID ROUTES PASSING THROUGH A PAIR OF PARALLEL RESISTORS SUCH THAT THE SIGNAL PASSED BY THE TWO CATHODES OF SAID FIRST-MENTIONED DIODES AND THE SIGNAL PASSED BY SAID PARALLEL RESISTORS ARE FED TO A SECOND HYBRID NETWORK IN WHICH THEY ARE COMBINED TO FORM A COMPOSITE OUTPUT SIGNAL COMPRISING SIDEBANDS AND A PORTION OF THE CARRIER.
Claim 2
Dependent Claim
123 words
A CARRIER FREQUENCY MODULATION SYSTEM COMPRISING, IN COMBINATION, MEANS WHEREIN A CARRIER SIGNAL IS FED TO A HYBRID NETWORK WHICH SPLITS THE SIGNAL ALONG TWO ROUTES, ONE OF SAID ROUTES PASSING THROUGH TWO DIODES IN PARALLEL, EACH OF SAID DIODES HAVING ITS CATHODE INTERCONNECTED TO THE ANODE OF THE OTHER BY ANOTHER DIODE POLED FOR CONDUCTION FROM SAID CATHODES TO SAID ANODES, RESPECTIVELY, AND THE OTHER OF SAID ROUTES PASSING THROUGH A PAIR OF PARALLEL RESISTORS SUCH THAT THE SIGNAL PASSED BY THE TWO CATHODES OF SAID FIRST-MENTIONED DIODES AND THE SIGNAL PASSED BY SAID PARALLEL RESISTORS ARE FED TO A SECOND HYBRID NETWORK IN WHICH THEY ARE COMBINED TO FORM A COMPOSITE OUTPUT SIGNAL COMPRISING SIDEBANDS AND A PORTION OF THE CARRIER.
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) | 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 |