US3340476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sine wave synthesis circuit
Assignee: International Research and Development Co Ltd
•
Filing: 1965-03-23
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Granted: 1967-09-05
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Expires: 1985-03-23
Abstract
No abstract record available.
Inventors
- 👤 Glen H Thomas
- 👤 Robert S Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01; H03B21/02; H03B28/00; H03K; H03K4/00; H03K4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN APPARATUS FOR CONVERTING A PULSED INPUT SIGNAL INTO A SINE WAVE OUTPUT SIGNAL, THE COMBINATION OF APPARATUS RESPONSIVE TO SAID PULSED SIGNAL FOR GENERATING A SQUARE WAVE SIGNAL WHICH CHANGES VOLTAGE LEVELS EACH TIME AN INPUT PULSE IS APPLIED THERETO, MEANS FOR INTEGRATING THE SQUARE WAVE SIGNAL, CIRCUITRY COUPLED TO THE OUTPUT OF SAID SQUARE WAVE GENERATING APPARATUS FOR PRODUCING A SIGNAL WHICH VARIES AS A FUNCTION OF THE FREQUENCY OF SAID SQUARE WAVE SIGNAL, MEANS FOR MULTIPLYING SAID LASTMENTIONED SIGNAL WITH THE INTEGRATED SIGNAL, AND A SINE WAVE SHAPER COUPLED TO THE OUTPUT OF SAID MULTIPLYING MEANS.
Claim 2
Dependent Claim
99 words
IN APPARATUS FOR CONVERTING A PULSED INPUT SIGNAL INTO A SINE WAVE OUTPUT SIGNAL, THE COMBINATION OF APPARATUS RESPONSIVE TO SAID PULSED SIGNAL FOR GENERATING A SQUARE WAVE SIGNAL WHICH CHANGES VOLTAGE LEVELS EACH TIME AN INPUT PULSE IS APPLIED THERETO, MEANS FOR INTEGRATING THE SQUARE WAVE SIGNAL, CIRCUITRY COUPLED TO THE OUTPUT OF SAID SQUARE WAVE GENERATING APPARATUS FOR PRODUCING A SIGNAL WHICH VARIES AS A FUNCTION OF THE FREQUENCY OF SAID SQUARE WAVE SIGNAL, MEANS FOR MULTIPLYING SAID LASTMENTIONED SIGNAL WITH THE INTEGRATED SIGNAL, AND A SINE WAVE SHAPER COUPLED TO THE OUTPUT OF SAID MULTIPLYING MEANS.
References Cited (Backward Citations)
US2748278A
Cited
US3155838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |