US3100874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency-tracking filter
Assignee: Jersey Production Research Co
•
Filing: 1959-07-01
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Granted: 1963-08-13
•
Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Duane E Soland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:24
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR TRACKING AND FILTERING THE DOMINANT FREQUENCY IN A COMPLEX ELECTRICAL SIGNAL WHICH COMPRISES IN COMBINATION MEANS FOR GENERATING CONTROL PULSES AT A FREQUENCY PROPORTIONAL TO BUT AT LEAST TWICE AS HIGH AS THE DOMINANT FREQUENCY IN SAID COMPLEX SIGNAL; A PLURALITY OF SAMPLING DEVICES SEQUENTIALLY RESPONSIVE TO SAID CONTROL PULSES, EACH OF SAMPLING DEVICES INCLUDING MEANS FOR HOLDING EACH VOLTAGE SAMPLE UNTIL THE NEXT SUCCEEDING VOLTAGE SAMPLE IS TAKEN; MEANS FOR PASSING SAID COMPLEX SIGNAL THROUGH SAID SAMPLING DEVICES IN SEQUENCE; MEANS FOR RECOVERING OUTPUT SIGNALS FROM SAID SAMPLING DEVICES; MEANS FOR WEIGHTING SAID OUTPUT SIGNALS IN ACCORDANCE WITH A PREDETERMINED FILTER NETWORK RESPONSE; AND MEANS FOR MIXING SAID WEIGHTED OUTPUT SIGNALS.
Claim 2
Dependent Claim
114 words
APPARATUS FOR TRACKING AND FILTERING THE DOMINANT FREQUENCY IN A COMPLEX ELECTRICAL SIGNAL WHICH COMPRISES IN COMBINATION MEANS FOR GENERATING CONTROL PULSES AT A FREQUENCY PROPORTIONAL TO BUT AT LEAST TWICE AS HIGH AS THE DOMINANT FREQUENCY IN SAID COMPLEX SIGNAL; A PLURALITY OF SAMPLING DEVICES SEQUENTIALLY RESPONSIVE TO SAID CONTROL PULSES, EACH OF SAMPLING DEVICES INCLUDING MEANS FOR HOLDING EACH VOLTAGE SAMPLE UNTIL THE NEXT SUCCEEDING VOLTAGE SAMPLE IS TAKEN; MEANS FOR PASSING SAID COMPLEX SIGNAL THROUGH SAID SAMPLING DEVICES IN SEQUENCE; MEANS FOR RECOVERING OUTPUT SIGNALS FROM SAID SAMPLING DEVICES; MEANS FOR WEIGHTING SAID OUTPUT SIGNALS IN ACCORDANCE WITH A PREDETERMINED FILTER NETWORK RESPONSE; AND MEANS FOR MIXING SAID WEIGHTED OUTPUT SIGNALS.
References Cited (Backward Citations)
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Cited
US2553284A
Cited
US2651718A
Cited
US2921738A
Cited
US2878999A
Cited
US2953645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |