Patent US2305862A successfully refreshed from Google Patents.
US3249868A
Expired / Lapsed
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Phase measuring of noise-contaminated signal
Assignee: Northrop Grumman Corp
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Filing: 1963-03-07
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Granted: 1966-05-03
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Eugene H Sheftelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:28
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR THE MEASUREMENT OF PHASE OF AN INPUT SIGNAL COMPRISING A SOURCE OF A FIRST REFERENCE VOLTAGE, A SOURCE OF A SECOND REFERENCE VOLTAGE, SAID FIRST AND SECOND REFERENCE VOLTAGES BEING SIMILAR BUT IN QUADRATURE TO EACH OTHER, A FIRST PHASE DETECTOR, MEANS FOR APPLYING SAID INPUT SIGNAL AND SAID FIRST REFERENCE VOLTAGE TO SAID FIRST PHASE DETECTOR, A SECOND PHASE DETECTOR, MEANS FOR APPLYING SAID INPUT SIGNAL AND SAID SECOND REFERENCE VOLTAGE TO SAID SECOND PHASE DETECTOR, MEANS FOR AVERAGING THE OUTPUTS OF SAID FIRST AND SECOND PHASE DETECTORS AND MEANS FOR MEASURING THE RATIO OF THE AVERAGE OUTPUTS OF SAID FIRST AND SECOND PHASE DETETORS, SAID RATIO BEING PROPORTIONAL TO THE TANGENT OF THE PHASE ANGLE OF THE INPUT SIGNAL WITH RESPECT TO ONE OF SAID REFERENCE VOLTAGES.
Claim 2
Dependent Claim
131 words
APPARATUS FOR THE MEASUREMENT OF PHASE OF AN INPUT SIGNAL COMPRISING A SOURCE OF A FIRST REFERENCE VOLTAGE, A SOURCE OF A SECOND REFERENCE VOLTAGE, SAID FIRST AND SECOND REFERENCE VOLTAGES BEING SIMILAR BUT IN QUADRATURE TO EACH OTHER, A FIRST PHASE DETECTOR, MEANS FOR APPLYING SAID INPUT SIGNAL AND SAID FIRST REFERENCE VOLTAGE TO SAID FIRST PHASE DETECTOR, A SECOND PHASE DETECTOR, MEANS FOR APPLYING SAID INPUT SIGNAL AND SAID SECOND REFERENCE VOLTAGE TO SAID SECOND PHASE DETECTOR, MEANS FOR AVERAGING THE OUTPUTS OF SAID FIRST AND SECOND PHASE DETECTORS AND MEANS FOR MEASURING THE RATIO OF THE AVERAGE OUTPUTS OF SAID FIRST AND SECOND PHASE DETETORS, SAID RATIO BEING PROPORTIONAL TO THE TANGENT OF THE PHASE ANGLE OF THE INPUT SIGNAL WITH RESPECT TO ONE OF SAID REFERENCE VOLTAGES.
References Cited (Backward Citations)
US3060380A
Cited
US3054064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |