US3277289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic circuits utilizing a cross-connection between complementary outputs
Assignee: International Business Machines Corp
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Filing: 1963-12-31
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Granted: 1966-10-04
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Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Fred K Buelow
- 👤 Daniel W Murphy
- 👤 Jr John R Turnbull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:17
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A LOGIC CIRCUIT, COMPRISING: (A) FIRST AND SECOND BISTABLE PAIRS OF TUNNEL DIODES, EACH PAIR COMPRISING: (1) A NODE CONNECTED TO AN ANODE OF ONE DIODE AND A CATHODE OF THE OTHER; (2) A POSITIVE POTENTIAL SOURCE CONNECTED TO THE ANODE OF THE OTHER DIODE; AND (3) A NEGATIVE POTENTIAL SOURCE CONNECTED TO THE CATHODE OF SAID ONE DIODE; (B) FIRST AND SECOND OUTPUT CURRENT CARRYING MEANS CONNECTED RESPECTIVELY TO THE NODES OF THE FIRST AND SECOND PAIRS; (C) FIRST AND SECOND CONTROL CURRENT CARRYING MEANS CONNECTED RESPECTIVELY TO THE NODES OF THE FIRST AND SECOND PAIRS; (D) A PLURALITY OF LOGIC SIGNAL INPUT MEANS, EACH HAVING A SIGNAL INPUT SHIFTABLE BETWEEN TWO SIGNAL CONDITIONS OF OPPOSITE BINARY SIGNIFICANCE, AND CURRENT CARRYING OUTPUT MEANS CONTROLLED BY SAID SIGNAL INPUT, A FIRST ONE OF SAID LOGIC SIGNAL INPUT MEANS HAVING ITS SIGNAL INPUT CONNECTED TO ONE OF SAID NODES; AND (E) MEANS CONNECTING SELECTED COMBINATION OF SAID CURRENT CARRYING OUTPUT MEANS RESPECTIVELY TO SAID FIRST AND SECOND CONTROL CURRENT CARRYING MEANS, SAID CONNECTING MEANS INCLUDING A CONNECTION BETWEEN THE OTHER OF SAID NODES AND THE CURRENT CARRYING OUTPUT MEANS OF SAID FIRST LOGIC SIGNAL INPUT MEANS.
Claim 2
Dependent Claim
195 words
A LOGIC CIRCUIT, COMPRISING: (A) FIRST AND SECOND BISTABLE PAIRS OF TUNNEL DIODES, EACH PAIR COMPRISING: (1) A NODE CONNECTED TO AN ANODE OF ONE DIODE AND A CATHODE OF THE OTHER; (2) A POSITIVE POTENTIAL SOURCE CONNECTED TO THE ANODE OF THE OTHER DIODE; AND (3) A NEGATIVE POTENTIAL SOURCE CONNECTED TO THE CATHODE OF SAID ONE DIODE; (B) FIRST AND SECOND OUTPUT CURRENT CARRYING MEANS CONNECTED RESPECTIVELY TO THE NODES OF THE FIRST AND SECOND PAIRS; (C) FIRST AND SECOND CONTROL CURRENT CARRYING MEANS CONNECTED RESPECTIVELY TO THE NODES OF THE FIRST AND SECOND PAIRS; (D) A PLURALITY OF LOGIC SIGNAL INPUT MEANS, EACH HAVING A SIGNAL INPUT SHIFTABLE BETWEEN TWO SIGNAL CONDITIONS OF OPPOSITE BINARY SIGNIFICANCE, AND CURRENT CARRYING OUTPUT MEANS CONTROLLED BY SAID SIGNAL INPUT, A FIRST ONE OF SAID LOGIC SIGNAL INPUT MEANS HAVING ITS SIGNAL INPUT CONNECTED TO ONE OF SAID NODES; AND (E) MEANS CONNECTING SELECTED COMBINATION OF SAID CURRENT CARRYING OUTPUT MEANS RESPECTIVELY TO SAID FIRST AND SECOND CONTROL CURRENT CARRYING MEANS, SAID CONNECTING MEANS INCLUDING A CONNECTION BETWEEN THE OTHER OF SAID NODES AND THE CURRENT CARRYING OUTPUT MEANS OF SAID FIRST LOGIC SIGNAL INPUT MEANS.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |