Patent US3400278A successfully refreshed from Google Patents.
US3400278A
Expired / Lapsed
US
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Non-saturating transistor logic circuit
Assignee: International Business Machines Corp
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Filing: 1960-12-28
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Granted: 1968-09-03
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Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 James L Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:48
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/10; H03K19/082; H03K19/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A LOGIC CIRCUIT COMPRISING A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, AN INPUT CIRCUIT CONNECTED TO SAID BASE ELECTRODE, A NEGATIVE IMPEDANCE DEVICE CONNECTED BETWEEN THE BASE AND EMITTER ELECTRODES OF SAID TRANSISTOR, A COMMON COLLECTOR CONFIGURATION COUPLED INTO A FEEDBACK PATH BETWEEN THE BASE AND COLLECTOR ELECTRODES OF SAID TRANSISTOR, MEANS FOR ADJUSTING THE OPERATING POINT OF THE TRANSISTOR OUTSIDE THE SATURATION REGION THEREOF, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE COMMON COLLECTOR CONFIGURATION FOR PROVIDING AN OUTPUT SIGNAL WHICH IS THE INVERSE OF A SIGNAL SUPPLIED TO THE INPUT CIRCUIT.
Claim 2
Dependent Claim
93 words
A LOGIC CIRCUIT COMPRISING A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, AN INPUT CIRCUIT CONNECTED TO SAID BASE ELECTRODE, A NEGATIVE IMPEDANCE DEVICE CONNECTED BETWEEN THE BASE AND EMITTER ELECTRODES OF SAID TRANSISTOR, A COMMON COLLECTOR CONFIGURATION COUPLED INTO A FEEDBACK PATH BETWEEN THE BASE AND COLLECTOR ELECTRODES OF SAID TRANSISTOR, MEANS FOR ADJUSTING THE OPERATING POINT OF THE TRANSISTOR OUTSIDE THE SATURATION REGION THEREOF, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE COMMON COLLECTOR CONFIGURATION FOR PROVIDING AN OUTPUT SIGNAL WHICH IS THE INVERSE OF A SIGNAL SUPPLIED TO THE INPUT CIRCUIT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |