US3262061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct coupled transistor amplifier including negative feedback
Assignee: Sprague Electric Co
•
Filing: 1963-01-28
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Granted: 1966-07-19
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Kahn Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:46
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F1/00; H03F1/34; Y; Y10; Y10T; Y10T74/00; Y10T74/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
AN AMPLIFIER CIRCUIT COMPRISING FOUR DIRECT COUPLED TRANSISTORS, THE FIRST TRANSISTOR AND THE THIRD TRANSISTOR OF SAID TRANSISTORS BEING IN COMMON EMITTER CONFIGURATION, THE SECOND TRANSISTOR AND THE FOURTH TRANSISTOR OF SAID TRANSISTORS BEING IN COMMON COLLECTOR CONFIGURATION, SAID TRANSISTORS BEING OF COMPLEMENTARY POLARITY WITH SAID THIRD TRANSISTOR BEING OF OPPOSITE POLARITY FROM SAID FOURTH TRANSISTOR, AND AN OVERALL NEGATIVE FEEDBACK LOOP FROM THE EMITTER OF SAID FOURTH TRANSISTOR TO THE EMITTER OF SAID FIRST TRANSISTOR.
Claim 2
Dependent Claim
76 words
AN AMPLIFIER CIRCUIT COMPRISING FOUR DIRECT COUPLED TRANSISTORS, THE FIRST TRANSISTOR AND THE THIRD TRANSISTOR OF SAID TRANSISTORS BEING IN COMMON EMITTER CONFIGURATION, THE SECOND TRANSISTOR AND THE FOURTH TRANSISTOR OF SAID TRANSISTORS BEING IN COMMON COLLECTOR CONFIGURATION, SAID TRANSISTORS BEING OF COMPLEMENTARY POLARITY WITH SAID THIRD TRANSISTOR BEING OF OPPOSITE POLARITY FROM SAID FOURTH TRANSISTOR, AND AN OVERALL NEGATIVE FEEDBACK LOOP FROM THE EMITTER OF SAID FOURTH TRANSISTOR TO THE EMITTER OF SAID FIRST TRANSISTOR.
References Cited (Backward Citations)
CA627487A
Cited
US3140448A
Cited
US2996683A
Cited
US3116460A
Cited
US3107331A
Cited
US3148334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |