Patent US3127566A successfully refreshed from Google Patents.
US3127566A
Expired / Lapsed
US
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Parametric amplifier with no external idler circuit loading and with isolation of signal and idler frequencies
Assignee: Cutler Hammer Inc
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Filing: 1961-06-20
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Granted: 1964-03-31
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Peter P Lombardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:06
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PARAMETRIC AMPLIFIER, THE COMBINATION WHICH COMPRISES A NON-LINEAR VARIABLE-CAPACITANCE DIODE CIRCUIT RESONANT AT A PREDETERMINED IDLER FREQUENCY SUBSTANTIALLY HIGHER THAN THE INPUT SIGNAL FREQUENCY, A CIRCUIT SHUNTING SAID DIODE CIRCUIT AND RESONANT AT SUBSTANTIALLY THE IDLER FREQUENCY FOR ESTABLISHING SUBSTANTIALLY A SHORT-CIRCUIT ACROSS THE DIODE CIRCUIT AT THE IDLER FREQUENCY, A SIGNAL INPUT CIRCUIT IN SERIES WITH SAID DIODE AND SHUNTING CIRCUITS, AN INDUCTANCE IN SAID SIGNAL INPUT CIRCUIT TUNED TO PRODUCE SUBSTANTIALLY SERIES RESONANCE WITH THE DIODE AND SHUNTING CIRCUITS AT THE SIGNAL FREQUENCY, AND MEANS FOR SUPPLYING PUMP FREQUENCY POWER TO THE DIODE AT A PUMP FREQUENCY HIGH COMPARED TO SAID INPUT SIGNAL FREQUENCY AND YIELDING A DIFFERENCE THEREFROM EQUAL TO SAID PREDETERMINED IDLER FREQUENCY.
Claim 2
Dependent Claim
119 words
IN A PARAMETRIC AMPLIFIER, THE COMBINATION WHICH COMPRISES A NON-LINEAR VARIABLE-CAPACITANCE DIODE CIRCUIT RESONANT AT A PREDETERMINED IDLER FREQUENCY SUBSTANTIALLY HIGHER THAN THE INPUT SIGNAL FREQUENCY, A CIRCUIT SHUNTING SAID DIODE CIRCUIT AND RESONANT AT SUBSTANTIALLY THE IDLER FREQUENCY FOR ESTABLISHING SUBSTANTIALLY A SHORT-CIRCUIT ACROSS THE DIODE CIRCUIT AT THE IDLER FREQUENCY, A SIGNAL INPUT CIRCUIT IN SERIES WITH SAID DIODE AND SHUNTING CIRCUITS, AN INDUCTANCE IN SAID SIGNAL INPUT CIRCUIT TUNED TO PRODUCE SUBSTANTIALLY SERIES RESONANCE WITH THE DIODE AND SHUNTING CIRCUITS AT THE SIGNAL FREQUENCY, AND MEANS FOR SUPPLYING PUMP FREQUENCY POWER TO THE DIODE AT A PUMP FREQUENCY HIGH COMPARED TO SAID INPUT SIGNAL FREQUENCY AND YIELDING A DIFFERENCE THEREFROM EQUAL TO SAID PREDETERMINED IDLER FREQUENCY.
References Cited (Backward Citations)
US3022466A
Cited
US3040267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |