US3898648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchro-to-digital converter
Assignee: United States Department of the Navy
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Filing: 1973-12-07
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Granted: 1975-08-05
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Expires: 1993-12-07
Abstract
Abstract A synchro to digital converter analyzing the three synchro signals and determining which 30* zone is being examined by the relative amplitudes of the signals and selecting a base angle, and modifying said base angle by an angle of arc tan WHEREIN Smax is the largest synchro signal value and Smin is the smallest synchro signal value.
Inventors
- 👤 Michael C Gariazzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:43
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/38; G08C19/46; G08C19/48; H; H03; H03M; H03M1/00; H03M1/12; H03M1/64; H03M1/645
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A synchro to digital converter having synchro signals S1, S2, and S3, comprising: means for comparing said three synchro signals with each other to determine the 30* zone being examined and producing a base angle based on said zone, and yielding Smin and Smax, wherein Smax is the largest synchro signal and Smin is the smallest synchro signal of signals S1, S2, and S3; means for converting analog signals Smax and Smin into digital form; means for producing an angle X arc tan
Claim 2
Dependent Claim
83 words
A synchro to digital converter having synchro signals S1, S2, and S3, comprising: means for comparing said three synchro signals with each other to determine the 30* zone being examined and producing a base angle based on said zone, and yielding Smin and Smax, wherein Smax is the largest synchro signal and Smin is the smallest synchro signal of signals S1, S2, and S3; means for converting analog signals Smax and Smin into digital form; means for producing an angle X arc tan
Claim 3
Dependent Claim
20 words
A synchro to digital converter as recited in claim 1 wherein said phase detector angle is either 0* or 180*.
References Cited (Backward Citations)
US3533097A
Cited
US3573801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |