US3169222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-emitter transistor circuits
Assignee: RCA Corp
•
Filing: 1960-12-30
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Granted: 1965-02-09
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Krugman
- 👤 Robert C Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:34
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0261
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A SEMICONDUCTOR CIRCUIT COMPRISING IN COMBINATION A TRANSISTOR HAVING A FIRST EMITTER ELECTRODE, A SECOND EMITTER ELECTRODE, A BASE ELECTRODE AND A COLLECTOR ELECTRODE; AN IMPEDANCE ELEMENT CONNECTED BETWEEN SAID FIRST EMITTER AND BASE ELECTRODES FOR DEVELOPING A BIAS THEREBETWEEM; MEANS INCLUDING SAID IMPEDANCE ELEMENT FOR CONNECTING SAID FIRST EMITTER, BASE AND COLLECTOR ELECTRODES IN AN AMPLIFIER CIRCUIT CONFIGURATION; MEANS INCLUDING SAID IMPEDANCE ELEMENT FOR DIRECT CURRENT CONDUCTIVELY CONNECTING SAID COLLECTOR ELECTRODE TO SAID SECOND EMITTER ELECTRODE; AND CONTROL CIRCUIT MEANS COUPLED TO SAID SECOND EMITTER ELECTRODE FOR CONTROLLING THE MAGNITUDE OF SECOND EMITTER ELECTRODE CURRENT WHEREBY A BIAS IS DEVELOPED ACROSS SAID IMPEDANCE ELEMENT TO CONTROL THE MAGNITUDE OF CURRENT IN SAID FIRST EMITTER ELECTRODE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |