US3235809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relative phase correction circuit
Assignee: AT&T Inc
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Filing: 1961-12-26
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Granted: 1966-02-15
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Dietrich A Alsberg
- 👤 Louis H Hendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:22
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CIRCUIT FOR CORRECTING FOR RELATIVE PHASE SHIFTS BETWEEN MULTI-CHANNEL CIRCUITS, SAID CIRCUIT COMPRISING AT LEAST TWO AMPLIFIER CHANNELS, EACH HAVING AN INPUT CIRCUIT FOR RECEIVING SIGNALS AND AN OUTPUT CIRCUIT, AT LEAST ONE OF SAID CHANNELS CONTAINING CIRCUIT STRUCTURE SUBJECT TO ERRATIC PHASE SHIFTS, A SEPARATE MODULATOR COUPLED TO EACH OUTPUT CIRCUT, A MODULATING SOURCE COUPLED TO EACH MODULATOR TO DEVELOP IN SAID MODULATOR SIDEBANDS FROM SIGNALS PASSED THROUGH ITS AMPLIFIER CHANNEL, CIRCUIT MEANS COUPLING EACH MODULATOR TO THE INPUT CIRCUIT OF THE OTHER OF THE TWO CHANNELS TO TRANSMIT SAID SIDEBANDS THERETHROUGH, AND A FREQUENCY SELECTIVE MEANS COUPLED TO EACH CHANNEL OUTPUT CIRCUIT FOR SEPARATING FOR TRANSMISSION AT LEAST ON SIDEBAND FROM ALL OTHER FREQUENCY COM-
Claim 2
Dependent Claim
118 words
A CIRCUIT FOR CORRECTING FOR RELATIVE PHASE SHIFTS BETWEEN MULTI-CHANNEL CIRCUITS, SAID CIRCUIT COMPRISING AT LEAST TWO AMPLIFIER CHANNELS, EACH HAVING AN INPUT CIRCUIT FOR RECEIVING SIGNALS AND AN OUTPUT CIRCUIT, AT LEAST ONE OF SAID CHANNELS CONTAINING CIRCUIT STRUCTURE SUBJECT TO ERRATIC PHASE SHIFTS, A SEPARATE MODULATOR COUPLED TO EACH OUTPUT CIRCUT, A MODULATING SOURCE COUPLED TO EACH MODULATOR TO DEVELOP IN SAID MODULATOR SIDEBANDS FROM SIGNALS PASSED THROUGH ITS AMPLIFIER CHANNEL, CIRCUIT MEANS COUPLING EACH MODULATOR TO THE INPUT CIRCUIT OF THE OTHER OF THE TWO CHANNELS TO TRANSMIT SAID SIDEBANDS THERETHROUGH, AND A FREQUENCY SELECTIVE MEANS COUPLED TO EACH CHANNEL OUTPUT CIRCUIT FOR SEPARATING FOR TRANSMISSION AT LEAST ON SIDEBAND FROM ALL OTHER FREQUENCY COM-
References Cited (Backward Citations)
US2771518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |