US3202937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unijunction transistor oscillator circuit
Assignee: Individual
•
Filing: 1963-03-25
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Granted: 1965-08-24
•
Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 John R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:46
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/35; H03K3/351
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
AN IMPROVED RELAXATION OSCILLATOR CIRCUIT OF THE TYPE WHEREIN A UNIJUNCTION TRANSISTOR HAVING AN EMITTER AND A FIRST AND SECOND BASE ELECTRODE IS CONNECTED TO THE JUNCTION BETWEEN A FIRST RESISTOR AND CAPACITOR ACROSS WHICH THE VOLTAGE FOR CHARGING SAID CAPACITOR IS APPLIED, SAID IMPROVEMENT COMPRISING FIRST, SECOND AND THIRD MEANS, EACH HAVING A RELATIVELY HIGH RESISTANCE TO REVERSE CURRENT FLOW THERETHROUGH UNTIL A PREDETERMINED VOLTAGE IS EXCEEDED WHEN THE RESISTANCE IS RELATIVELY LOW, MEANS CONNECTING SAID FIRST MEANS BETWEEN THE EMITTER OF SAID UNIJUNCTION TRANSISTOR AND THE JUNCTION BETWEEN SAID FIRST RESISTOR AND CAPACITOR, MEANS CONNECTING SAID SECOND MEANS BETWEEN THE SECOND BASE OF SAID UNIJUNCTION TRANSISTOR AND THE END OF SAID FIRST RESISTOR WHICH IS CONNECTED TO SAID VOLTAGE FOR CHARGING SAID CAPACITOR, A SECOND RESISTOR CONNECTED BETWEEN SAID FIRST BASE AND THE END OF SAID CAPACITOR WHICH IS NOT CONNECTED TO SAID FIRST RESISTOR AND MEANS CONNECTING SAID THIRD MEANS BETWEEN SAID SECOND BASE AND THE END OF SAID CAPACITOR WHICH IS NOT CONNECTED TO SAID FIRST RESISTOR.
Claim 2
Dependent Claim
171 words
AN IMPROVED RELAXATION OSCILLATOR CIRCUIT OF THE TYPE WHEREIN A UNIJUNCTION TRANSISTOR HAVING AN EMITTER AND A FIRST AND SECOND BASE ELECTRODE IS CONNECTED TO THE JUNCTION BETWEEN A FIRST RESISTOR AND CAPACITOR ACROSS WHICH THE VOLTAGE FOR CHARGING SAID CAPACITOR IS APPLIED, SAID IMPROVEMENT COMPRISING FIRST, SECOND AND THIRD MEANS, EACH HAVING A RELATIVELY HIGH RESISTANCE TO REVERSE CURRENT FLOW THERETHROUGH UNTIL A PREDETERMINED VOLTAGE IS EXCEEDED WHEN THE RESISTANCE IS RELATIVELY LOW, MEANS CONNECTING SAID FIRST MEANS BETWEEN THE EMITTER OF SAID UNIJUNCTION TRANSISTOR AND THE JUNCTION BETWEEN SAID FIRST RESISTOR AND CAPACITOR, MEANS CONNECTING SAID SECOND MEANS BETWEEN THE SECOND BASE OF SAID UNIJUNCTION TRANSISTOR AND THE END OF SAID FIRST RESISTOR WHICH IS CONNECTED TO SAID VOLTAGE FOR CHARGING SAID CAPACITOR, A SECOND RESISTOR CONNECTED BETWEEN SAID FIRST BASE AND THE END OF SAID CAPACITOR WHICH IS NOT CONNECTED TO SAID FIRST RESISTOR AND MEANS CONNECTING SAID THIRD MEANS BETWEEN SAID SECOND BASE AND THE END OF SAID CAPACITOR WHICH IS NOT CONNECTED TO SAID FIRST RESISTOR.
References Cited (Backward Citations)
US2947916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |