US3234477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametric amplifiers with symmetrically located diode loop for idler circuit
Assignee: Ferranti International PLC
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Filing: 1964-03-11
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Granted: 1966-02-08
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Expires: 1984-03-11
Abstract
No abstract record available.
Inventors
- 👤 Pearson John Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:42
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
, A PARAMETRIC AMPLIFIER INCLUDING AN ELECTROMAGNETIC WAVE TRANSMISSION PATH ADAPTED TO RECEIVE ENERGY FROM A PUMP SOURCE, A PAIR OF MATCHED VARIABLE CAPACITANCE SEMICONDUCTOR DIODES CLOSELY SPACED AND CONNECTED IN PARALLEL BUT WITH REVERSE POLARITY TO FORM AN IDLER CIRCUIT AND CONNECTED TO SAID TRANSMISSION PATH TRANSVERSE TO THE DIRECTION OF PROPAGATION OF ENERGY ALONG SAID TRANMISSION PATH SO THAT THE VOLTAGES DEVELOPED ACROSS SAID DIODES DUE TO SAID PUMP SOURCE ARE EQUAL IN MAGNITUDE AND PHASE, AND MEANS FOR SO CONNECTING A SOURCE OF SIGNAL ENERGY TO SAID DIODES THAT THE VOLTAGES DEVELOPED ACROSS SAID DIODES DUE TO SAID SIGNAL SOURCE ARE EQUAL IN MAGNITUDE AND PHASE.
Claim 2
Dependent Claim
109 words
, A PARAMETRIC AMPLIFIER INCLUDING AN ELECTROMAGNETIC WAVE TRANSMISSION PATH ADAPTED TO RECEIVE ENERGY FROM A PUMP SOURCE, A PAIR OF MATCHED VARIABLE CAPACITANCE SEMICONDUCTOR DIODES CLOSELY SPACED AND CONNECTED IN PARALLEL BUT WITH REVERSE POLARITY TO FORM AN IDLER CIRCUIT AND CONNECTED TO SAID TRANSMISSION PATH TRANSVERSE TO THE DIRECTION OF PROPAGATION OF ENERGY ALONG SAID TRANMISSION PATH SO THAT THE VOLTAGES DEVELOPED ACROSS SAID DIODES DUE TO SAID PUMP SOURCE ARE EQUAL IN MAGNITUDE AND PHASE, AND MEANS FOR SO CONNECTING A SOURCE OF SIGNAL ENERGY TO SAID DIODES THAT THE VOLTAGES DEVELOPED ACROSS SAID DIODES DUE TO SAID SIGNAL SOURCE ARE EQUAL IN MAGNITUDE AND PHASE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |