US3566393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converters delivering in analogue form two voltages respectively proportional to the sine and cosine of an input angle given in digital form
Assignee: Thales SA
•
Filing: 1967-06-15
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Granted: 1971-02-23
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Expires: 1987-06-15
Abstract
Abstract A DIGITAL-TO-ANALOGUE CONVERTER CIRCUIT OF THE TYPE SUPPLYING, FROM AN ANGLE 01 COMPRISED BETWEEN 0 AND 90* AND GIVEN IN DITIGAL FORM, TWO OUTPUT VOLTAGES US1 AND US2 SUCH THAT US1 =TAN 01 US2 THE CIRCUIT COMPRISES TO THIS END TWO OPERATIONAL AMPLIFIERS, RESPECTIVELY FEEDING TWO LINEAR DECODERS, WITH TWO FEEDBACK LOOPS BETWEEN THE OUTPUTS OF THE DECODERS AND THE INPUTS OF THE AMPLIFIERS.
Inventors
- 👤 Jean Girault
- 👤 Andre Bonnal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:22
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |