Patent US3234479A successfully refreshed from Google Patents.
US3234479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Series energized transistor amplifier having temperature compensation
Assignee: Sony Corp
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Filing: 1962-10-05
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Granted: 1966-02-08
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Shimada Satoshi
- 👤 Fujimoto Toshihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:39
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/307; H03F3/00; H03F3/30; H03F3/3083; H03F3/3086; H03F3/3098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SERIES ENERGIZED TRANSISTOR AMPLIFIER COMPRISING (A) A DIRECT CURRENT SOURCE, (B) A PAIR OF TRANSISTORS EACH HAVING A BASE, AN EMITTER, AND A COLLECTOR ELECTRODE, (C) A SERIES CIRCUIT INCLUDING THE EMITTER AND COLLECTOR OF EACH TRANSISTOR CONNECTED ACROSS SAID DIRECT CURRENT SOURCE, (D) INPUT MEANS INCLUDING A PAIR OF BASE BIAS CIRCUITS EACH CONNECTED ACROSS SAID DIRECT CURRENT SOURCE AND EACH CONNECTED TO THE BASE ELECTRODE OF A RESPECTIVE ONE OF SAID TRANSISTORS, (E) A LOAD CONNECTED BETWEEN A COMMON CONNECTION POINT OF SAID TRANSISTORS AND ONE SIDE OF SAID DIRECT CURRENT SOURCE, AND (F) A TEMPERATURE COMPENSATING ELEMENT CONNECTED TO ONLY ONE OF SAID BASE BIAS CIRCUITS WHEREBY TEMPERATURE COMPENSATIONS OF SAID TRANSISTORS CAN BE SIMULTANEOUSLY PERFORMED.
Claim 2
Dependent Claim
120 words
A SERIES ENERGIZED TRANSISTOR AMPLIFIER COMPRISING (A) A DIRECT CURRENT SOURCE, (B) A PAIR OF TRANSISTORS EACH HAVING A BASE, AN EMITTER, AND A COLLECTOR ELECTRODE, (C) A SERIES CIRCUIT INCLUDING THE EMITTER AND COLLECTOR OF EACH TRANSISTOR CONNECTED ACROSS SAID DIRECT CURRENT SOURCE, (D) INPUT MEANS INCLUDING A PAIR OF BASE BIAS CIRCUITS EACH CONNECTED ACROSS SAID DIRECT CURRENT SOURCE AND EACH CONNECTED TO THE BASE ELECTRODE OF A RESPECTIVE ONE OF SAID TRANSISTORS, (E) A LOAD CONNECTED BETWEEN A COMMON CONNECTION POINT OF SAID TRANSISTORS AND ONE SIDE OF SAID DIRECT CURRENT SOURCE, AND (F) A TEMPERATURE COMPENSATING ELEMENT CONNECTED TO ONLY ONE OF SAID BASE BIAS CIRCUITS WHEREBY TEMPERATURE COMPENSATIONS OF SAID TRANSISTORS CAN BE SIMULTANEOUSLY PERFORMED.
References Cited (Backward Citations)
US2955257A
Cited
US2994833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |