US3223936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor limited amplifier circuit
Assignee: Westinghouse Air Brake Co
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Filing: 1962-10-23
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Granted: 1965-12-14
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:16
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A TRANSISTOR LIMITER AMPLIFIER COMPRISING FIRST AND SECOND TRANSISTORS DIRECTLY COUPLED WITH EACH HAVING EMITTER, COLLECTOR AND BASIE ELECTRODES, SAID FIRST TRANSISTOR HAVING ITS EMITTER ELECTRODE CONNECTED TO THE NEGATIVE TERMINAL OF A SOURCE OF OPERASTING POTENTIAL AND HAVING ITS COLLECTOR ELECTRODE CONNECTED TO THE POSITIVE TERMINAL OF SAID SOURCE, A VOLTAGE DIVIDER CONECTED BETWEEN THE POSITIVE TERMINAL OF SAID SOURCE AND GROUND, SAID SECOND TRANSISTOR HAVING ITS BASE ELECTRODE CONNECTED TO THE JUNCTION OF SAID VOLTAGE DIVIDER, HAVING ITS EMITTER ELECTRODE CONNECTED TO GROUND, DIVIDER, HAVING ITS EMMITTER ELECTRODE CONNECTED TO THE POSITIVE TERMINAL OF SAID SOURCE, A FIRST RESISTANCE MEANS CONNECTING INPUT SIGNALS TO BE AMPLIFIED TO THE BASE ELECTRODE OF SAID FIRST TRANSISTOR, A SECOND RESISTANCE MEANS COUPLING THE AMPLIFIED SIGNALS FROM THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR TO THE BASE ELECTRODE OF SAID SECOND TRANSISTOR, A TERMINAL MEANS CONNECTED TO THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR FOR DERIVING OUTPUT SIGNALS THEREFROM, AND NEGATIVE FEEDBACK CIRCUIT MEANS SERIALLY CONNECTING THE COLLECTOR ELECTRODE TO THE BASE ELECTRODE OF EACH OF SAID FIRST AND SECOND TRANSISTORS, SAID FEEDBACK MEANS COMPRISING A PAIR OF
Claim 2
Dependent Claim
186 words
A TRANSISTOR LIMITER AMPLIFIER COMPRISING FIRST AND SECOND TRANSISTORS DIRECTLY COUPLED WITH EACH HAVING EMITTER, COLLECTOR AND BASIE ELECTRODES, SAID FIRST TRANSISTOR HAVING ITS EMITTER ELECTRODE CONNECTED TO THE NEGATIVE TERMINAL OF A SOURCE OF OPERASTING POTENTIAL AND HAVING ITS COLLECTOR ELECTRODE CONNECTED TO THE POSITIVE TERMINAL OF SAID SOURCE, A VOLTAGE DIVIDER CONECTED BETWEEN THE POSITIVE TERMINAL OF SAID SOURCE AND GROUND, SAID SECOND TRANSISTOR HAVING ITS BASE ELECTRODE CONNECTED TO THE JUNCTION OF SAID VOLTAGE DIVIDER, HAVING ITS EMITTER ELECTRODE CONNECTED TO GROUND, DIVIDER, HAVING ITS EMMITTER ELECTRODE CONNECTED TO THE POSITIVE TERMINAL OF SAID SOURCE, A FIRST RESISTANCE MEANS CONNECTING INPUT SIGNALS TO BE AMPLIFIED TO THE BASE ELECTRODE OF SAID FIRST TRANSISTOR, A SECOND RESISTANCE MEANS COUPLING THE AMPLIFIED SIGNALS FROM THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR TO THE BASE ELECTRODE OF SAID SECOND TRANSISTOR, A TERMINAL MEANS CONNECTED TO THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR FOR DERIVING OUTPUT SIGNALS THEREFROM, AND NEGATIVE FEEDBACK CIRCUIT MEANS SERIALLY CONNECTING THE COLLECTOR ELECTRODE TO THE BASE ELECTRODE OF EACH OF SAID FIRST AND SECOND TRANSISTORS, SAID FEEDBACK MEANS COMPRISING A PAIR OF
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |