Patent US3214692A successfully refreshed from Google Patents.
US3214692A
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Method of and device for measuring small alternating signals
Assignee: Czech Academy of Sciences
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Filing: 1961-01-06
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Granted: 1965-10-26
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Expires: 1981-01-06
Abstract
No abstract record available.
Inventors
- 👤 Karpinsky Jurij
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:58
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/0864; G01R29/0892
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD FOR MEASURING WEAK ALTERNATING SIGNALS BY MEANS OF A WIRELESS RECEIVER HAVING A SUFFICIENTLY WIDE AND FLAT SELECTIVITY CURVE, COMPRISING THE STEPS OF COUPLING TO THE INPUT OF THE RECEIVER SIMULTANEOUSLY THE SIGNAL TO BE MEASURED AND A REFERENCE SIGNAL OF A KNOWN LEVEL AND OF SO NEAR A FREQUENCY THAT BOTH SIGNALS ARE WITHIN THE FLAT PART OF THE SELECTIVITY CURVE OF THE RECEIVER, AND MEASURING THE RATIO OF THE A.C. AND D.C. COMPONENT OF THE OUTPUT SIGNAL OF THE DEMODULATOR OF THE RECEIVER.
Claim 2
Independent Claim
87 words
A METHOD FOR MEASURING WEAK ALTERNATING SIGNALS BY MEANS OF A WIRELESS RECEIVER HAVING A SUFFICIENTLY WIDE AND FLAT SELECTIVITY CURVE, COMPRISING THE STEPS OF COUPLING TO THE INPUT OF THE RECEIVER SIMULTANEOUSLY THE SIGNAL TO BE MEASURED AND A REFERENCE SIGNAL OF A KNOWN LEVEL AND OF SO NEAR A FREQUENCY THAT BOTH SIGNALS ARE WITHIN THE FLAT PART OF THE SELECTIVITY CURVE OF THE RECEIVER, AND MEASURING THE RATIO OF THE A.C. AND D.C. COMPONENT OF THE OUTPUT SIGNAL OF THE DEMODULATOR OF THE RECEIVER.
References Cited (Backward Citations)
US2295629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |