Patent US3119985A successfully refreshed from Google Patents.
US3119985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel diode switch circuits for memories
Assignee: RCA Corp
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Filing: 1961-01-03
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Granted: 1964-01-28
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SWITCH CIRCUIT COMPRISING POSITIVE AND NEGATIVE SIGNAL INPUT TERMINALS, A DIRECT CURRENT BIAS TERMINAL, AN IMPEDANCE AND A TUNNEL DIODE CONNECTED IN SERIES BETWEEN THE BIAS TERMINAL AND ONE OF SAID INPUT TERMINALS, AN INPUT TUNNEL RECTIFIER COUPLED BETWEEN THE OTHER OF SAID INPUT TERMINALS AND THE TUNNEL DIODE, SAID DIODE AND RECTIFIER BEING POLED AND BIASED SO THAT THE DIODE IS NORMALLY IN ONE OF ITS VOLTAGE STATES AND SO THAT AN INPUT PULSE ON ONLY ONE OF THE INPUT TERMINALS IS INSUFFICIENT TO RENDER SAID RECTIFIER CONDUCTIVE AND IS THEREBY PREVENTED FROM BEING COUPLED TO THE OTHER INPUT TERMINAL, AN OUT-
Claim 2
Dependent Claim
104 words
A SWITCH CIRCUIT COMPRISING POSITIVE AND NEGATIVE SIGNAL INPUT TERMINALS, A DIRECT CURRENT BIAS TERMINAL, AN IMPEDANCE AND A TUNNEL DIODE CONNECTED IN SERIES BETWEEN THE BIAS TERMINAL AND ONE OF SAID INPUT TERMINALS, AN INPUT TUNNEL RECTIFIER COUPLED BETWEEN THE OTHER OF SAID INPUT TERMINALS AND THE TUNNEL DIODE, SAID DIODE AND RECTIFIER BEING POLED AND BIASED SO THAT THE DIODE IS NORMALLY IN ONE OF ITS VOLTAGE STATES AND SO THAT AN INPUT PULSE ON ONLY ONE OF THE INPUT TERMINALS IS INSUFFICIENT TO RENDER SAID RECTIFIER CONDUCTIVE AND IS THEREBY PREVENTED FROM BEING COUPLED TO THE OTHER INPUT TERMINAL, AN OUT-
References Cited (Backward Citations)
US3011155A
Cited
US3017613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |