US4172286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the generation of sine oscillations
Assignee: Siemens AG
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Filing: 1977-12-22
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Granted: 1979-10-23
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Expires: 1997-12-22
Abstract
Abstract A system for the direct synthesis of sine oscillations by means of a sine table which has a digital counter as its input. The output of the counter is also coupled to a logarithm device and from there to a digital analog converter. The converter is coupled to a controlled pulse generator which feeds the counter with a frequency which varies logarithmically with time.
Inventors
- 👤 Gunter Wess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:28
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/02; G06F1/03; G06F1/0321; G06F2101/00; G06F2101/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A system for the direct synthesis of sinusoidal oscillations comprising: an operable sine table, a digital counter having outputs coupled to related inputs of said sine table, a controllable pulse generator for setting/loading said digital counter, a digital logarithm device, the outputs of said digital counter being coupled to inputs of said digital logarithm device, a digital analog converter, means coupling the outputs of said digital logarithm device to respective inputs of said digital analog converter, and means utilizing the output of said digital analog converter.
Claim 2
Independent Claim
86 words
A system for the direct synthesis of sinusoidal oscillations comprising: an operable sine table, a digital counter having outputs coupled to related inputs of said sine table, a controllable pulse generator for setting/loading said digital counter, a digital logarithm device, the outputs of said digital counter being coupled to inputs of said digital logarithm device, a digital analog converter, means coupling the outputs of said digital logarithm device to respective inputs of said digital analog converter, and means utilizing the output of said digital analog converter.
Claim 3
Dependent Claim
31 words
A system in accordance with claim 1 wherein an electron beam display tube is provided and the output of said digital analog converter is coupled to said electron beam display tube.
Claim 4
Dependent Claim
48 words
A system in accordance with claim 1 wherein the controllable pulse generator has a control input and wherein the output of said digital analog converter is coupled to said control input, whereby the frequency of the pulse generator and hence of the sine table change logarithmically with time.
Claim 5
Dependent Claim
31 words
A system in accordance with claim 1 wherein said sine table has a plurality of PROMS for receiving the outputs of said digital counter and for developing a sine output therefrom.
References Cited (Backward Citations)
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US3633017A
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US3605035A
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US3739374A
Cited
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Cited
US4042973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |