US3094671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect parametric amplifier
Assignee: AT&T Inc
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Filing: 1959-06-12
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Granted: 1963-06-18
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Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 Charles G B Garrett
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:21
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PARAMETRIC AMPLIFIER COMPRISING AT LEAST ONE UNIT COMPRISING IN SUCCESSION A FIRST REGION OF A DIELECTRIC MATERIAL AND A SECOND REGION OF A SEMICONDUCTOR MATERIAL, SAID SEMICONDUCTOR MATERIAL HAVING A CARRIER MOBILITY OF AT LEAST 100 CENTIMETERS SQUARED PER VOLT-SECOND, SAID TWO REGIONS BEING IN INTIMATE CONTACT, TOGETHER WITH MEANS FOR IMPRESSING A PUMPING FIELD AND A SIGNAL FIELD ACROSS AT LEAST ONE SAID UNIT IN A DIRECTION SUCH AS TO ENCOMPASS THE SAID TWO REGIONS AND MEANS FOR SUPPORTING AN IDLER FREQUENCY, THE PUMPING FIELD BEING SUCH AS TO VARY THE CAPACITANCE OF THE SAID DEVICE AT A FREQUENCY SUCH AS TO RESULT IN PARAMETRIC AMPLIFIATION OF THE SAID SIGNAL FIELD.
Claim 2
Dependent Claim
113 words
A PARAMETRIC AMPLIFIER COMPRISING AT LEAST ONE UNIT COMPRISING IN SUCCESSION A FIRST REGION OF A DIELECTRIC MATERIAL AND A SECOND REGION OF A SEMICONDUCTOR MATERIAL, SAID SEMICONDUCTOR MATERIAL HAVING A CARRIER MOBILITY OF AT LEAST 100 CENTIMETERS SQUARED PER VOLT-SECOND, SAID TWO REGIONS BEING IN INTIMATE CONTACT, TOGETHER WITH MEANS FOR IMPRESSING A PUMPING FIELD AND A SIGNAL FIELD ACROSS AT LEAST ONE SAID UNIT IN A DIRECTION SUCH AS TO ENCOMPASS THE SAID TWO REGIONS AND MEANS FOR SUPPORTING AN IDLER FREQUENCY, THE PUMPING FIELD BEING SUCH AS TO VARY THE CAPACITANCE OF THE SAID DEVICE AT A FREQUENCY SUCH AS TO RESULT IN PARAMETRIC AMPLIFIATION OF THE SAID SIGNAL FIELD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |