US3146407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable regenerative feedback amplifier having constant attenuation variable phase shift network
Assignee: Unisys Corp
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Filing: 1960-12-01
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Granted: 1964-08-25
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Expires: 1980-12-01
Abstract
No abstract record available.
Inventors
- 👤 Philip W Crist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A CIRCUIT COMPRISING A NON-PHASE INVERTING AMPLIFIER AND A PAIR OF L NETWORKS CONNECTED IN TANDEM BETWEEN THE OUTPUT AND INPUT TERMINALS OF SAID AMPLIFIER, THE FIRST OF SAID PAIR OF NETWORKS COMPRISING A REACTIVE SERIES ELEMENT AND A RESISTIVE SHUNT ELEMENT, AND THE SECOND OF SAID PAIR OF NETWORKS COMPRISING A RESISTIVE SERIES ELEMENT AND A REACTIVE SHUNT ELEMENT, SAID SERIES ELEMENTS BEING CONNECTED IN SERIES RELATIONSHIP WITH SAID OUTPUT AND INPUT TERMINALS, SAID SHUNT ELEMENTS BEING CONNECTED IN SHUNT RELATIONSHIP WITH SAID OUTPUT AND INPUT TERMINALS, THE INPUT TERMINAL OF SAID AMPLIFIER BEING CONNECTED TO A POSITIONABLE TAP ON SAID RESISTIVE SERIES ELEMENT OF SAID SECOND NETWORK, THE TOTAL RESISTANCE OF SAID RESISTIVE SERIES ELEMENT REMAINING FIXED IRRESPECTIVE OF THE POSITION OF SAID TAP, AND THE OUTPUT TERMINAL OF SAID AMPLIFIER BEING CONNECTED TO THE REACTIVE SERIES ELEMENT OF SAID FIRST NETWORK.
Claim 2
Dependent Claim
144 words
A CIRCUIT COMPRISING A NON-PHASE INVERTING AMPLIFIER AND A PAIR OF L NETWORKS CONNECTED IN TANDEM BETWEEN THE OUTPUT AND INPUT TERMINALS OF SAID AMPLIFIER, THE FIRST OF SAID PAIR OF NETWORKS COMPRISING A REACTIVE SERIES ELEMENT AND A RESISTIVE SHUNT ELEMENT, AND THE SECOND OF SAID PAIR OF NETWORKS COMPRISING A RESISTIVE SERIES ELEMENT AND A REACTIVE SHUNT ELEMENT, SAID SERIES ELEMENTS BEING CONNECTED IN SERIES RELATIONSHIP WITH SAID OUTPUT AND INPUT TERMINALS, SAID SHUNT ELEMENTS BEING CONNECTED IN SHUNT RELATIONSHIP WITH SAID OUTPUT AND INPUT TERMINALS, THE INPUT TERMINAL OF SAID AMPLIFIER BEING CONNECTED TO A POSITIONABLE TAP ON SAID RESISTIVE SERIES ELEMENT OF SAID SECOND NETWORK, THE TOTAL RESISTANCE OF SAID RESISTIVE SERIES ELEMENT REMAINING FIXED IRRESPECTIVE OF THE POSITION OF SAID TAP, AND THE OUTPUT TERMINAL OF SAID AMPLIFIER BEING CONNECTED TO THE REACTIVE SERIES ELEMENT OF SAID FIRST NETWORK.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |