Patent US3217177A successfully refreshed from Google Patents.
US3217177A
Expired / Lapsed
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Logic circuits
Assignee: RCA Corp
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Filing: 1962-06-11
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Granted: 1965-11-09
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Walker Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:48
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A LOGIC CIRCUIT COMPRISING: A PLURALITY OF TRANSISTORS OF LIKE CONDUCTIVITY TYPE EACH CONNECTED IN THE COMMON COLLECTOR CONFIGURATION AND HAVING A BASE ELECTRODE AND AN EMITTER ELECTRODE, A LIKE PLURALITY OF DIODE GATES, ONE FOR EACH OF SAID TRANSISTORS, EACH OF SAID GATES INCLUDING A NUMBER OF DIODES HAVING A FIRST LIKE ELECTRODE CONNECTED TO THE BASE ELECTRODE OF THE ASSOCIATED TRANSISTOR, SAID DIODES BEING CONNECTED TO CONDUCT FORWARD CURRENT IN THE SAME DIRECTION RELATIVE TO THE ASSOCIATED SAID BASE ELECTRODE AS THE FORWARD EMITTER-BASE DIODE CURRENT OF THE ASSOCIATED TRANSISTOR, EACH OF SAID GATES FURTHER INCLUDING A RESISTOR CONNECTED AT ONE END TO EACH SAID FIRST LIKE ELECTRODE, MEANS FOR APPLYING A BIAS VOLTAGE AT THE OTHER END OF EACH SAID RESISTOR OF A POLARITY AND AMPLITUDE TENDING TO FORWARD BIAS EACH OF SAID GATE DIODES AND EACH SAID EMITTER-BASE DIODE, A COMMON EMITTER RESISTOR CONNECTED BETWEEN EACH SAID EMITTER ELECTRODE AND A POINT OF REFERENCE POTENTIAL, FIRST AND SECOND OUTPUT TRANSISTORS EACH HAVING A COLLECTOR ELECTRODER, AN EMITTER ELECTRODE AND A BASE ELECTRODE,
Claim 2
Dependent Claim
176 words
A LOGIC CIRCUIT COMPRISING: A PLURALITY OF TRANSISTORS OF LIKE CONDUCTIVITY TYPE EACH CONNECTED IN THE COMMON COLLECTOR CONFIGURATION AND HAVING A BASE ELECTRODE AND AN EMITTER ELECTRODE, A LIKE PLURALITY OF DIODE GATES, ONE FOR EACH OF SAID TRANSISTORS, EACH OF SAID GATES INCLUDING A NUMBER OF DIODES HAVING A FIRST LIKE ELECTRODE CONNECTED TO THE BASE ELECTRODE OF THE ASSOCIATED TRANSISTOR, SAID DIODES BEING CONNECTED TO CONDUCT FORWARD CURRENT IN THE SAME DIRECTION RELATIVE TO THE ASSOCIATED SAID BASE ELECTRODE AS THE FORWARD EMITTER-BASE DIODE CURRENT OF THE ASSOCIATED TRANSISTOR, EACH OF SAID GATES FURTHER INCLUDING A RESISTOR CONNECTED AT ONE END TO EACH SAID FIRST LIKE ELECTRODE, MEANS FOR APPLYING A BIAS VOLTAGE AT THE OTHER END OF EACH SAID RESISTOR OF A POLARITY AND AMPLITUDE TENDING TO FORWARD BIAS EACH OF SAID GATE DIODES AND EACH SAID EMITTER-BASE DIODE, A COMMON EMITTER RESISTOR CONNECTED BETWEEN EACH SAID EMITTER ELECTRODE AND A POINT OF REFERENCE POTENTIAL, FIRST AND SECOND OUTPUT TRANSISTORS EACH HAVING A COLLECTOR ELECTRODER, AN EMITTER ELECTRODE AND A BASE ELECTRODE,
References Cited (Backward Citations)
CA605821A
Cited
US1382914A
Cited
US2310198A
Cited
US2930028A
Cited
US2995667A
Cited
US3039009A
Cited
US3058007A
Cited
US3073970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |