US3600690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase difference detectors
Assignee: BAE Systems Electronics Ltd
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Filing: 1970-05-25
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Granted: 1971-08-17
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Expires: 1990-05-25
Abstract
Abstract This invention provides a phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount. Delay means are provided for relatively delaying the two waves to an extend dependent upon the lead or lag tolerance permitted in the phase relationship between the two waves, and a JK flip-flop circuit is provided to one data input terminal of which one of the two relatively delayed waves are applied and to the other data input terminal of which the same wave inverted is applied. The other of the delayed waves is applied to the sampling input terminal of said circuit.
Inventors
- 👤 Colin Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:24
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount, means for relatively delaying said waves to an extent dependent upon the lead or lag tolerances permitted in the phase relationship between the two waves, a JK flip-flop or like circuit, means for applying one of said two relatively delayed waves to one data input terminal of said circuit, means for inverting said one wave and applying it to the other data input terminal of the circuit and means for applying the other of said two relatively delayed waves to the sampling input terminal of said circuit.
Claim 2
Dependent Claim
109 words
A phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount, means for relatively delaying said waves to an extent dependent upon the lead or lag tolerances permitted in the phase relationship between the two waves, a JK flip-flop or like circuit, means for applying one of said two relatively delayed waves to one data input terminal of said circuit, means for inverting said one wave and applying it to the other data input terminal of the circuit and means for applying the other of said two relatively delayed waves to the sampling input terminal of said circuit.
Claim 3
Dependent Claim
68 words
A detector as claimed in claim 1 and including a second JK flip-flop or similar circuit, means for applying the said other wave to one data input terminal of the second circuit, means for inverting said other wave and applying it to the other data input terminal of the second circuit and means for applying the said one wave to the sampling input terminal of said second 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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |