US3193773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulator-demodulator circuit
Assignee: ABB Norden Holding AB
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Filing: 1961-11-14
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Granted: 1965-07-06
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Uglum Oddgeir
- 👤 Flaten Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:45
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
MODULATOR-DEMODULATOR CIRCUIT WITH AN INPUT STAGE AND AN OUTPUT STAGE, A LOAD MEANS CONNECTED IN THE OUTPUT STAGE, A FEED BACK IMPEDANCE MEANS IN THE OUTPUT STAGE, ONE OF THE SAID MEANS HAVING TWO END TERMINALS AND A CENTER TAP, THE INPUT STAGE HAVING TWO END TERMINALS AND A CENTER AN INPUT QUANTITY AND FIRST AND SECOND OUTPUT TERMINALS MEANS, SAID OUTPUT STAGE CONTAINING TWO CONTROLLED CURRENT CONNECTING MEANS OPERATING PERIODICALLY AT THE SAME FREQUENCY BUT IN A PUSH-PULL MANNER, ONE OF SAID CURRENT CONNECTING MEANS BEING CONNECTED BETWEEN ONE OF SAID END TERMINALS AND ONE OF THE OUTPUT TERMINAL MEANS OF THE INPUT STAGE, THE OTHER CURRENT CONNECTING MEANS BEING CONNECTED BETWEEN THE OTHER END TERMINAL AND THE SAME OUTPUT TERMINAL MEANS OF THE INPUT STAGE, THE OTHER OF SAID LOAD AND FEEDBACK IMPEDANCE MEANS BEING CONNECTED BETWEEN SAID CENTER TAP AND THE OTHER OUTPUT TERMINAL MEANS OF THE INPUT STAGE, AND MEANS TO SUPPLY THE VOLTAGE GENERATED ACROSS SAID FEEDBACK IMPEDANCE TO ONE OF THE INPUT TERMINALS OF SAID INPUT STAGE, WHEREBY A FEEDBACK SIGNAL CONFORMING TO THE INPUT QUANTITY IS OBTAINED AND SUPPLIED TO THE INPUT SIDE OF SAID MODULATOR-DEMODULATOR CIRCUIT.
Claim 2
Dependent Claim
194 words
MODULATOR-DEMODULATOR CIRCUIT WITH AN INPUT STAGE AND AN OUTPUT STAGE, A LOAD MEANS CONNECTED IN THE OUTPUT STAGE, A FEED BACK IMPEDANCE MEANS IN THE OUTPUT STAGE, ONE OF THE SAID MEANS HAVING TWO END TERMINALS AND A CENTER TAP, THE INPUT STAGE HAVING TWO END TERMINALS AND A CENTER AN INPUT QUANTITY AND FIRST AND SECOND OUTPUT TERMINALS MEANS, SAID OUTPUT STAGE CONTAINING TWO CONTROLLED CURRENT CONNECTING MEANS OPERATING PERIODICALLY AT THE SAME FREQUENCY BUT IN A PUSH-PULL MANNER, ONE OF SAID CURRENT CONNECTING MEANS BEING CONNECTED BETWEEN ONE OF SAID END TERMINALS AND ONE OF THE OUTPUT TERMINAL MEANS OF THE INPUT STAGE, THE OTHER CURRENT CONNECTING MEANS BEING CONNECTED BETWEEN THE OTHER END TERMINAL AND THE SAME OUTPUT TERMINAL MEANS OF THE INPUT STAGE, THE OTHER OF SAID LOAD AND FEEDBACK IMPEDANCE MEANS BEING CONNECTED BETWEEN SAID CENTER TAP AND THE OTHER OUTPUT TERMINAL MEANS OF THE INPUT STAGE, AND MEANS TO SUPPLY THE VOLTAGE GENERATED ACROSS SAID FEEDBACK IMPEDANCE TO ONE OF THE INPUT TERMINALS OF SAID INPUT STAGE, WHEREBY A FEEDBACK SIGNAL CONFORMING TO THE INPUT QUANTITY IS OBTAINED AND SUPPLIED TO THE INPUT SIDE OF SAID MODULATOR-DEMODULATOR CIRCUIT.
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |