US3328607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trigger circuit having adjustable signal sensitivity
Assignee: HP Inc
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Filing: 1965-01-18
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Granted: 1967-06-27
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Expires: 1985-01-18
Abstract
No abstract record available.
Inventors
- 👤 Edgar G Stromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A SIGNALLING CIRCUIT COMPRISING: A PAIR OF TRANSISTORS, EACH HAVING EMITTER, BASE AND COLLECTOR ELECTRODES; A SOURCE OF REFERENCE POTENTIAL CONNECTED TO EACH OF SAID BASE ELECTRODES; AN IMPEDANCE ELEMENT HAVING A PAIR OF END TERMINALS AND A TAP TERMINAL CONNECTED TO THE IMPEDANCE ELEMENT INTERMEDIATE THE END TERMINALS THEREOF; A SERIES CIRCUIT INCLUDING A TUNNEL DIODE AND THE END TERMINALS OF SAID IMPEDANCE ELEMENT CONNECTED BETWEEN THE EMITTER ELECTRODES OF SAID TRANSISTORS; A SOURCE OF CURRENT CONNECTED TO THE COMMON CONNECTION OF SAID TUNNEL DIODE AND IMPEDANCE ELEMENT TO BIAS SAID TUNNEL DIODE FOR OPERATION IN AT LEAST ONE STABLE OPERATING STATE; AN INPUT FOR SAID SIGNALLING CIRCUIT CONNECTED TO THE TAP TERMINAL OF SAID IMPEDANCE ELEMENT FOR RECEIVING APPLIED SIGNALS; AND MEANS CONNECTED TO THE COLLECTOR ELECTRODES OF SAID TRANSISTORS FOR PRODUCING AN OUTPUT SIGNAL AS THE COMBINATION OF SIGNALS APPEARING ON SAID COLLECTOR ELECTRODES.
Claim 2
Dependent Claim
147 words
A SIGNALLING CIRCUIT COMPRISING: A PAIR OF TRANSISTORS, EACH HAVING EMITTER, BASE AND COLLECTOR ELECTRODES; A SOURCE OF REFERENCE POTENTIAL CONNECTED TO EACH OF SAID BASE ELECTRODES; AN IMPEDANCE ELEMENT HAVING A PAIR OF END TERMINALS AND A TAP TERMINAL CONNECTED TO THE IMPEDANCE ELEMENT INTERMEDIATE THE END TERMINALS THEREOF; A SERIES CIRCUIT INCLUDING A TUNNEL DIODE AND THE END TERMINALS OF SAID IMPEDANCE ELEMENT CONNECTED BETWEEN THE EMITTER ELECTRODES OF SAID TRANSISTORS; A SOURCE OF CURRENT CONNECTED TO THE COMMON CONNECTION OF SAID TUNNEL DIODE AND IMPEDANCE ELEMENT TO BIAS SAID TUNNEL DIODE FOR OPERATION IN AT LEAST ONE STABLE OPERATING STATE; AN INPUT FOR SAID SIGNALLING CIRCUIT CONNECTED TO THE TAP TERMINAL OF SAID IMPEDANCE ELEMENT FOR RECEIVING APPLIED SIGNALS; AND MEANS CONNECTED TO THE COLLECTOR ELECTRODES OF SAID TRANSISTORS FOR PRODUCING AN OUTPUT SIGNAL AS THE COMBINATION OF SIGNALS APPEARING ON SAID COLLECTOR ELECTRODES.
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |