Patent US3435353A successfully refreshed from Google Patents.
US3435353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier-detector having wide dynamic range
Assignee: HP Inc
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Filing: 1966-02-04
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Granted: 1969-03-25
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Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 James W Sauber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:39
CPC Classifications
H; H03; H03D; H03D1/00; H03F; H03F3/00; H03F3/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A LOGARITHMIC AMPLIFIER-DETECTOR COMPRISING: A PLURLITY OF MODIFYING MEANS CONNECTED IN SERIES FOR MODIFYING THE AMPLITUDE OF AN ELECTRICAL SIGNAL BY SUBSTANTIALLY THE SAME FACTOR, MEANS FOR APPLYING A SIGNAL TO BE AMPLIFIED AND DETECTED AS THE INPUT SIGNAL TO THE FIRST ONE OF SAID MODIFYING MEANS, DETECTING MEANS COUPLED TO EACH OF SAID MODIFYING MEANS FOR RECTIFYING THE SIGNAL DERIVED THEREFROM, SHAPING MEANS COUPLED TO EACH OF SAID DETECTING MEANS FOR LOGARITHMICALLY VARYING THE AMPLITUDE OF THE RECTIFIED OUTPUT SIGNAL OF EACH OF SAID DETECTING MEANS, AND COMBINING MEANS TO COMBINE THE SHAPED AND RECTIFIED OUTPUT SIGNALS OF ALL OF SAID MODIFYING MEANS WHEREBY THE OUTPUT OF SAID COMBINING MEANS IS PROPORTIONAL IN AMPLITUDE TO THE LOGARITHM OF SAID INPUT SIGNAL.
Claim 2
Dependent Claim
122 words
A LOGARITHMIC AMPLIFIER-DETECTOR COMPRISING: A PLURLITY OF MODIFYING MEANS CONNECTED IN SERIES FOR MODIFYING THE AMPLITUDE OF AN ELECTRICAL SIGNAL BY SUBSTANTIALLY THE SAME FACTOR, MEANS FOR APPLYING A SIGNAL TO BE AMPLIFIED AND DETECTED AS THE INPUT SIGNAL TO THE FIRST ONE OF SAID MODIFYING MEANS, DETECTING MEANS COUPLED TO EACH OF SAID MODIFYING MEANS FOR RECTIFYING THE SIGNAL DERIVED THEREFROM, SHAPING MEANS COUPLED TO EACH OF SAID DETECTING MEANS FOR LOGARITHMICALLY VARYING THE AMPLITUDE OF THE RECTIFIED OUTPUT SIGNAL OF EACH OF SAID DETECTING MEANS, AND COMBINING MEANS TO COMBINE THE SHAPED AND RECTIFIED OUTPUT SIGNALS OF ALL OF SAID MODIFYING MEANS WHEREBY THE OUTPUT OF SAID COMBINING MEANS IS PROPORTIONAL IN AMPLITUDE TO THE LOGARITHM OF SAID INPUT SIGNAL.
References Cited (Backward Citations)
US2577750A
Cited
US3371224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |