US3134080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid feedback amplifier
Assignee: Nortel Networks Ltd
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Filing: 1962-10-29
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Granted: 1964-05-19
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Roger F Story
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:46
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/347
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
AN AMPLIFIER COMPRISING AN INPUT TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING; AMPLIFYING MEANS CONNECTED TO THE SECONDARY WINDING OF THE INPUT TRANSFORMER AND ADAPTED TO AMPLIFY THE SIGNAL PRESENT IN THE SAID SECONDARY WINDING; AN OUTPUT TRANSFORMER HAVING A PRIMARY WINDING CONNECTED TO THE OUTPUT OF THE AMPLIFYING MEANS AND ADAPTED TO RECEIVE THE AMPLIFIED SIGNAL PRODUCED BY THE AMPLIFYING MEANS, AN OUTPUT WINDING ADAPTED TO BE CONNECTED TO A LOAD, AND A FEEDBACK WINDING; A FIRST RESISTOR CONNECTED BETWEEN THE FEDBACK WINDING AND THE SAID SECONDARY WINDING THEREBY TO PROVIDE A NEGATIVE SHUNT VOLTAGE FEDBACK PATH; A FEEDBACK TRANSFORMER HAVING A PRIMARY WINDING CONNECTED IN SERIES WITH SAID SECONDARY WINDING AND A SECONDARY WINDING; AND A SECOND RESISTOR CONNECTED IN PARALLEL WITH THE SECONDARY WINDING OF THE FEEDBACK TRANSFORMER AND TO THE PRIMARY WINDING OF THE OUTPUT TRANSFORMER THEREBY TO PROVIDE A NEGATIVE CURRENT SERIES FEEDBACK PATH.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |