US3331029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A. c. transistor amplifiers for d. c. bias controlled stabilization
Assignee: ZF International UK Ltd
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Filing: 1963-11-13
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Granted: 1967-07-11
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Banasiewicz Henryk
- 👤 Fern Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN A.C. AMPLIFIER INCLUDING AN INPUT TRANSISTOR AND AN OUTPUT TRANSISTOR AND A FURTHER TRANSISTOR CONNECTED AS AN EMITTER FOLLOWER FOR PROVIDING AN A.C. COUPLING BETWEEN THE INPUT AND OUTPUT TRANSISTORS, THE A.C. SIGNAL TO BE AMPLIFIED BEING APPLIED TO THE BASE OF THE INPUT TRANSISTOR, A RESISTOR COMMON TO THE EMITTER CIRCUITS OF THE THREE TRANSISTORS, A PAIR OF RESISTORS IN THE COLLECTOR CIRCUIT OF SAID OUTPUT TRANSISTOR, A CAPACITOR GROUNDING A POINT INTERMEDIATE SAID PAIR OF RESISTORS, AND A FEEDBACK TRANSISTOR FOR SUPPLYING BASE CURRENT TO SAID INPUT TRAN-
Claim 2
Dependent Claim
91 words
AN A.C. AMPLIFIER INCLUDING AN INPUT TRANSISTOR AND AN OUTPUT TRANSISTOR AND A FURTHER TRANSISTOR CONNECTED AS AN EMITTER FOLLOWER FOR PROVIDING AN A.C. COUPLING BETWEEN THE INPUT AND OUTPUT TRANSISTORS, THE A.C. SIGNAL TO BE AMPLIFIED BEING APPLIED TO THE BASE OF THE INPUT TRANSISTOR, A RESISTOR COMMON TO THE EMITTER CIRCUITS OF THE THREE TRANSISTORS, A PAIR OF RESISTORS IN THE COLLECTOR CIRCUIT OF SAID OUTPUT TRANSISTOR, A CAPACITOR GROUNDING A POINT INTERMEDIATE SAID PAIR OF RESISTORS, AND A FEEDBACK TRANSISTOR FOR SUPPLYING BASE CURRENT TO SAID INPUT TRAN-
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |