US3346740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency parametric amplifier of the up-converter type
Assignee: Collins Radio Co
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Filing: 1963-07-23
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Granted: 1967-10-10
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Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 James D Brobst
- 👤 Joseph A Vanous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PARAMETRIC AMPLIFIER OF THE UP-CONVERTER TYPE, COMPRISING: PARALLEL VARIABLE CAPACITANCE MEANS HAVING NONLINEAR CAPACITANCE CHARACTERISTICS; TUNED CIRCUIT MEANS RESONANT AT A FIRST FREQUENCY FU AND CONNECTED TO THE OUTPUT SIDE OF SAID VARIABLE CAPACITANCE MEANS; PUMP MEANS CONNECTED TO THE INPUT SIDE OF SAID VARIABLE CAPACITANCE MEANS FOR VARYING THE CAPACITANCE THEREOF AT THE RATE OF A SECOND FREQUENCY FP; INPUT MEANS FOR SUPPLYING AN INPUT SIGNAL AT A THIRD FREQUENCY FS, SAID TUNED CIRCUIT MEANS INCLUDING AN INDUCTOR THE CENTER TAP OF WHICH IS A VIRTUAL GROUND, SAID INPUT MEANS BEING CONNECTED TO SAID CENTER TAP OF SAID INDCTOR AND OUTPUT MEANS CONNECTED TO SAID TUNED CIRCUIT MEANS FOR COUPLING AN OUTPUT SIGNAL FROM SAID PARAMETRIC AMPLIFIER AT SAID FIRST FREQUENCY FU, FU=FP+FS AND FP BEING OUTSIDE THE RESONANT FREQUENCY OF SAID TANK.
Claim 2
Dependent Claim
135 words
A PARAMETRIC AMPLIFIER OF THE UP-CONVERTER TYPE, COMPRISING: PARALLEL VARIABLE CAPACITANCE MEANS HAVING NONLINEAR CAPACITANCE CHARACTERISTICS; TUNED CIRCUIT MEANS RESONANT AT A FIRST FREQUENCY FU AND CONNECTED TO THE OUTPUT SIDE OF SAID VARIABLE CAPACITANCE MEANS; PUMP MEANS CONNECTED TO THE INPUT SIDE OF SAID VARIABLE CAPACITANCE MEANS FOR VARYING THE CAPACITANCE THEREOF AT THE RATE OF A SECOND FREQUENCY FP; INPUT MEANS FOR SUPPLYING AN INPUT SIGNAL AT A THIRD FREQUENCY FS, SAID TUNED CIRCUIT MEANS INCLUDING AN INDUCTOR THE CENTER TAP OF WHICH IS A VIRTUAL GROUND, SAID INPUT MEANS BEING CONNECTED TO SAID CENTER TAP OF SAID INDCTOR AND OUTPUT MEANS CONNECTED TO SAID TUNED CIRCUIT MEANS FOR COUPLING AN OUTPUT SIGNAL FROM SAID PARAMETRIC AMPLIFIER AT SAID FIRST FREQUENCY FU, FU=FP+FS AND FP BEING OUTSIDE THE RESONANT FREQUENCY OF SAID TANK.
References Cited (Backward Citations)
US3101452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |