US3280336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single resonance photodiode parametric amplifier converter
Assignee: Thales SA
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Filing: 1965-04-21
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Granted: 1966-10-18
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Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 David J Roulston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:55
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; G; G09; G09D; G09D3/00; G09D3/04; G09D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PARAMETRIC AMPLIFIER COMPRISING: A VARIABLE CAPACITANCE PHOTODIODE HAVING A CAPACITANCE CD AND TWO TERMINALS; MEANS FOR APPLYING A SIGNAL HAVING A FREQUENCY F1 TO SAID PHOTODIODE: A COAXIAL LINE, WITH AN OUTER CONDUCTOR AND A CENTRAL CONDUCTOR, AND OUTPUT TERMINALS IN SERIES WITH SAID PHOTODIODE, ONE OF SAID TERMINALS OF SAID PHOTODIODE BEING CONNECTED WITH SAID OUTER CONDUCTOR AND THE OTHER OF SAID TERMINALS OF SAID PHOTODIODE BEING COUPLED WITH SAID CENTRAL CONDUCTOR BY A COUPLING CAPACITANCE, THE INDUCTANCE OF SAID CENTRAL CONDUCTOR BEING TURNED WITH SAID CAPACITANCE CD AND SAID COUPLING CAPACITANCE TO A FREQUENCY F2=FP$F1, SAID FREQUENCY FP BEING MUCH HIGHER THAN SAID FREQUENCY F1 AND SAID COUPLING CAPACITANCE BEING BETWEEN 0.5 AND 2 TIMES SAID CAPACITANCE CD; A LOAD RESISTANCE RC CONNECTED BETWEEN SAID OUTPUT TERMINALS, SAID RESISTANCE RC BEING APPROXIMATELY DEFINED BY THE FOLLOWING RELATION:
Claim 2
Dependent Claim
140 words
A PARAMETRIC AMPLIFIER COMPRISING: A VARIABLE CAPACITANCE PHOTODIODE HAVING A CAPACITANCE CD AND TWO TERMINALS; MEANS FOR APPLYING A SIGNAL HAVING A FREQUENCY F1 TO SAID PHOTODIODE: A COAXIAL LINE, WITH AN OUTER CONDUCTOR AND A CENTRAL CONDUCTOR, AND OUTPUT TERMINALS IN SERIES WITH SAID PHOTODIODE, ONE OF SAID TERMINALS OF SAID PHOTODIODE BEING CONNECTED WITH SAID OUTER CONDUCTOR AND THE OTHER OF SAID TERMINALS OF SAID PHOTODIODE BEING COUPLED WITH SAID CENTRAL CONDUCTOR BY A COUPLING CAPACITANCE, THE INDUCTANCE OF SAID CENTRAL CONDUCTOR BEING TURNED WITH SAID CAPACITANCE CD AND SAID COUPLING CAPACITANCE TO A FREQUENCY F2=FP$F1, SAID FREQUENCY FP BEING MUCH HIGHER THAN SAID FREQUENCY F1 AND SAID COUPLING CAPACITANCE BEING BETWEEN 0.5 AND 2 TIMES SAID CAPACITANCE CD; A LOAD RESISTANCE RC CONNECTED BETWEEN SAID OUTPUT TERMINALS, SAID RESISTANCE RC BEING APPROXIMATELY DEFINED BY THE FOLLOWING RELATION:
References Cited (Backward Citations)
US3132258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |