US3304431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive transistor chopper using light emissive diode
Assignee: Texas Instruments Inc
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Filing: 1963-11-29
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Granted: 1967-02-14
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 James R Biard
- 👤 Edward L Bonin
- 👤 Jack S Kilby
- 👤 Gary E Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:48
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/14; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/575; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/085; H03F3/34; H03F3/343; H03K17/00; H03K17/51; H03K17/78; H03K17/795; H03K17/7955; H10; H10D; H10D99/00; H10F; H10F55/00; H10F55/20; H10F55/25; Y; Y10; Y10S; Y10S323/00; Y10S323/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
AN ELECTRO-OPTICAL CHOPPER FOR SWITCHING AN ELECTRICAL SIGNAL FROM A FIRST CIRCUIT TO A SECOND CIRCUIT, COMPRISING: (A) A PAIR OF TRANSISTORS COMPRISED OF A FIRST SEMICONDUCTOR MATERIAL EACH HAVING AN EMITTER REGION, A BASE REGION, A COLLECTOR REGION, EMITTER-BASE JUNCTION AND COLLECTOR-BASE JUNCTION WITH THE BASE AND COLLECTOR REGIONS OF ONE OF SAID PAIR OF TRANSISTORS INTERCONNECTED WITH THE BASE AND COLLECTOR REGIONS, RESPECTIVELY, OF THE OTHER OF SAID PAIR OF TRANSISTORS TO EFFECT AT LEAST A PARTIAL CANCELLATION OF THE JUNCTION VOLTAGES AS MEASURED BETWEEN THE EMITTER REGIONS OF SAID PAIR OF TRANSISTORS WHEN CONDUCTING. (B) AN INPUT TERMINAL CONNECTED TO THE EMITTER REGION OF SAID ONE OF SAID PAIR OF TRANSISTORS FOR CONNECTION INTO SAID FIRST CIRCUIT AND FOR THE APPLICATION OF SAID ELECTRICAL SIGNAL THERETO, (C) AN OUTPUT TERMINAL CONNECTED TO THE EMITTER REGION OF SAID OTHER OF SAID PAIR OF TRANSISTORS FOR CONNECTION INTO SAID SECOND CIRCUIT, (D) SAID PAIR OF TRANSISTORS CONDUCTING IN RESPONSE TO OPTICAL RADIATION INCIDENT THEREON WHICH HAS A
Claim 2
Dependent Claim
168 words
AN ELECTRO-OPTICAL CHOPPER FOR SWITCHING AN ELECTRICAL SIGNAL FROM A FIRST CIRCUIT TO A SECOND CIRCUIT, COMPRISING: (A) A PAIR OF TRANSISTORS COMPRISED OF A FIRST SEMICONDUCTOR MATERIAL EACH HAVING AN EMITTER REGION, A BASE REGION, A COLLECTOR REGION, EMITTER-BASE JUNCTION AND COLLECTOR-BASE JUNCTION WITH THE BASE AND COLLECTOR REGIONS OF ONE OF SAID PAIR OF TRANSISTORS INTERCONNECTED WITH THE BASE AND COLLECTOR REGIONS, RESPECTIVELY, OF THE OTHER OF SAID PAIR OF TRANSISTORS TO EFFECT AT LEAST A PARTIAL CANCELLATION OF THE JUNCTION VOLTAGES AS MEASURED BETWEEN THE EMITTER REGIONS OF SAID PAIR OF TRANSISTORS WHEN CONDUCTING. (B) AN INPUT TERMINAL CONNECTED TO THE EMITTER REGION OF SAID ONE OF SAID PAIR OF TRANSISTORS FOR CONNECTION INTO SAID FIRST CIRCUIT AND FOR THE APPLICATION OF SAID ELECTRICAL SIGNAL THERETO, (C) AN OUTPUT TERMINAL CONNECTED TO THE EMITTER REGION OF SAID OTHER OF SAID PAIR OF TRANSISTORS FOR CONNECTION INTO SAID SECOND CIRCUIT, (D) SAID PAIR OF TRANSISTORS CONDUCTING IN RESPONSE TO OPTICAL RADIATION INCIDENT THEREON WHICH HAS A
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |