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Patent US3217261A successfully refreshed from Google Patents.
US3217261A
Expired / Lapsed
US
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Monitoring system for a vestigial sideband transmitter whereby the quadrature component is eliminated
Assignee: Individual
•
Filing: 1963-08-27
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Granted: 1965-11-09
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Expires: 1983-08-27
Abstract
No abstract record available.
Inventors
- 👤 David S Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:04
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
MEANS FOR DISTORTIONLESS DEMODULATION OF VESTIGIAL SIDEBAND AMPLITUDE-MODULATED ELECTRICAL ENERGY WHICH COMPRISES; (A) MEANS TO SHAPE THE AMPLITUDE OF SAID MODULATED ENERGY FIRST AS A FUNCTION OF FREQUENCY ACCORDING TO A GIVE N VESTIGIAL CRITERION, (B) MEANS TO PROVIDE UNMODULATED ELECTRICAL ENERGY HAVING THE SAME PHASE AS SAID MODULATED ENERGY, (C) MEANS TO TEMPORARILY ALTER THE PHASE OF SAID UNMODULATED ELECTRICAL ENERGY BY NINETY DEGRESS, (D) MEANS TO ADJUST THIS PHASE INCRMENTALLY TO OBTAIN MINIMUM LOW FREQUENCY DEMODULATED OUTPUT, (E) MEANS TO RETURN THE PHASE OF SAID UNMODULATED ELECTRICAL ENERGY BY NINETY DEGREES TO APPROXIMATELY THE ORIGINAL PHASE OF SAID UNMODULATED ELECTRICAL ENERGY, AND (F) MEANS TO DEMODULATE SAID VESTIGIAL SIDEBAND AMPLITUDE-MODULATED ELECTRICAL ENERGY BY FORMING THE FIRSTORDER PRODUCT OF THE SAME WITH SAID UNMODULATED ELECTRICAL ENERGY.
Claim 2
Dependent Claim
127 words
MEANS FOR DISTORTIONLESS DEMODULATION OF VESTIGIAL SIDEBAND AMPLITUDE-MODULATED ELECTRICAL ENERGY WHICH COMPRISES; (A) MEANS TO SHAPE THE AMPLITUDE OF SAID MODULATED ENERGY FIRST AS A FUNCTION OF FREQUENCY ACCORDING TO A GIVE N VESTIGIAL CRITERION, (B) MEANS TO PROVIDE UNMODULATED ELECTRICAL ENERGY HAVING THE SAME PHASE AS SAID MODULATED ENERGY, (C) MEANS TO TEMPORARILY ALTER THE PHASE OF SAID UNMODULATED ELECTRICAL ENERGY BY NINETY DEGRESS, (D) MEANS TO ADJUST THIS PHASE INCRMENTALLY TO OBTAIN MINIMUM LOW FREQUENCY DEMODULATED OUTPUT, (E) MEANS TO RETURN THE PHASE OF SAID UNMODULATED ELECTRICAL ENERGY BY NINETY DEGREES TO APPROXIMATELY THE ORIGINAL PHASE OF SAID UNMODULATED ELECTRICAL ENERGY, AND (F) MEANS TO DEMODULATE SAID VESTIGIAL SIDEBAND AMPLITUDE-MODULATED ELECTRICAL ENERGY BY FORMING THE FIRSTORDER PRODUCT OF THE SAME WITH SAID UNMODULATED ELECTRICAL ENERGY.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |