US3144615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametric amplifier system
Assignee: AT&T Inc
•
Filing: 1959-02-26
•
Granted: 1964-08-11
•
Expires: 1979-02-26
Abstract
No abstract record available.
Inventors
- 👤 Rudolf S Engelbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:21
CPC Classifications
H; H03; H03F; H03F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN AMPLIFIER SYSTEM COMPRISING: A PAIR OF PARAMETRIC AMPLIFIERS HAVING INPUT, PUMPING AND OUTPUT CIRCUITS; MEANS FOR APPLYING PUMPING SIGNAL ENERGY AT A FREQUENCY W3 TO EACH OF SAID PUMPING CIRCUITS TO PARAMETRICALLY PUMP SAID AMPLIFIERS WITH MUTUALLY OPPOSITE PHASE RELATIONSHIP; FIRST AND SECOND SIGNAL TRANSLATING NETWORKS, ONE RESPONSIVE TO A FREQUENCY W2 AND THE OTHER RESPONSIVE TO A FREQUENCY W1, WHERE W1+W2=W3, COUPLED TO SAID INPUT CIRCUITS WITH ONE OF SAID NETWORKS COUPLED IN PUSH-PULL RELATIONSHIP AND THE OTHER IN PARALLEL; AND MEANS COUPLED TO SAID OUTPUT CIRCUITS FOR DERIVING AMPLIFIED SIGNAL ENERGY THEREFROM.
Claim 2
Dependent Claim
95 words
AN AMPLIFIER SYSTEM COMPRISING: A PAIR OF PARAMETRIC AMPLIFIERS HAVING INPUT, PUMPING AND OUTPUT CIRCUITS; MEANS FOR APPLYING PUMPING SIGNAL ENERGY AT A FREQUENCY W3 TO EACH OF SAID PUMPING CIRCUITS TO PARAMETRICALLY PUMP SAID AMPLIFIERS WITH MUTUALLY OPPOSITE PHASE RELATIONSHIP; FIRST AND SECOND SIGNAL TRANSLATING NETWORKS, ONE RESPONSIVE TO A FREQUENCY W2 AND THE OTHER RESPONSIVE TO A FREQUENCY W1, WHERE W1+W2=W3, COUPLED TO SAID INPUT CIRCUITS WITH ONE OF SAID NETWORKS COUPLED IN PUSH-PULL RELATIONSHIP AND THE OTHER IN PARALLEL; AND MEANS COUPLED TO SAID OUTPUT CIRCUITS FOR DERIVING AMPLIFIED SIGNAL ENERGY THEREFROM.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |