Patent US3219952A successfully refreshed from Google Patents.
US3219952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active electrical one-ports
Assignee: Associated Electrical Industries Ltd
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Filing: 1962-07-16
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Granted: 1965-11-23
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Saraga Wolja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:59
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/46; H03H11/02; H03H11/40; H03H11/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN ACTIVE TWO-TERMINAL NETWORK OF THE SANDBERG TYPE PRESENTING AN IMPEDANCE FUNCTION Z(P) AND COMPRISING A FOUR-ARM BRIDGE CIRCUIT HAVING PASSIVE RC ONEPORTS OF IMPEDANCE ZV IN TWO OPPOSITE ARMS THEREOF AND PASSIVE RC ONE-PORTS OF IMPEDANCE ZW IN ITS OTHER TWO ARMS, TOGETHER WITH A THREE-TERMINAL NEGATIVE IMPEDANCE CONVERTER OF CONVERSION RATIO -ZX/ZY CONNECTED TO THE BRIDGE CIRCUIT TO FORM SUCH SANDBERG TYPE NETWORK IN ONE OF THE TWO POSSIBLE FORMS THEREOF, CHARACTERISED IN THAT THE NETWORK IS REALIZED WITH ZV=K''/PZ8, ZW=K''ZA AND -ZX/ZY=-ZA/ZB, WHERE ZX, ZY, ZA, ZB AND 1/PZA ARE THE IMPEDANCES OF PASSIVE RC ONE-PORTS, AND THE TERMS K(ZA-ZB)/(1-PZAZB) AND K'' RESPECTIVELY EQUAL Z(P) AND K OR 1/PZ(P) AND 1/K ACCORDING TO THE PARTICULAR FORM OF THE NETWORK, K BEING A REAL CONSTANT.
Claim 2
Dependent Claim
127 words
AN ACTIVE TWO-TERMINAL NETWORK OF THE SANDBERG TYPE PRESENTING AN IMPEDANCE FUNCTION Z(P) AND COMPRISING A FOUR-ARM BRIDGE CIRCUIT HAVING PASSIVE RC ONEPORTS OF IMPEDANCE ZV IN TWO OPPOSITE ARMS THEREOF AND PASSIVE RC ONE-PORTS OF IMPEDANCE ZW IN ITS OTHER TWO ARMS, TOGETHER WITH A THREE-TERMINAL NEGATIVE IMPEDANCE CONVERTER OF CONVERSION RATIO -ZX/ZY CONNECTED TO THE BRIDGE CIRCUIT TO FORM SUCH SANDBERG TYPE NETWORK IN ONE OF THE TWO POSSIBLE FORMS THEREOF, CHARACTERISED IN THAT THE NETWORK IS REALIZED WITH ZV=K''/PZ8, ZW=K''ZA AND -ZX/ZY=-ZA/ZB, WHERE ZX, ZY, ZA, ZB AND 1/PZA ARE THE IMPEDANCES OF PASSIVE RC ONE-PORTS, AND THE TERMS K(ZA-ZB)/(1-PZAZB) AND K'' RESPECTIVELY EQUAL Z(P) AND K OR 1/PZ(P) AND 1/K ACCORDING TO THE PARTICULAR FORM OF THE NETWORK, K BEING A REAL CONSTANT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |