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US3233185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signal amplifier
Assignee: BK Technologies Corp
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Filing: 1960-04-27
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Granted: 1966-02-01
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 Young Frink Mansfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:11
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/56; H03F1/30; H03F1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
271 words
AN ELECTRICAL SIGNAL AMPLIFIER HAVING A PAIR OF INPUT AND A PAIR OF OUTPUT TERMINALS COMPRISING, IN COMBINATION, A DIRECT COUPLED AMPLIFIER, HAVING AN INPUT TERMINAL, AN OUTPUT TERMINAL AND A COMMON TERMINAL, MEANS CONNECTING SAID DIRECT COUPLED AMPLIFIER INPUT TERMINAL TO A FIRST OF SAID SIGNAL AMPLIFIER INPUT TERMINALS, A TRANSISTOR HAVING A BASE TERMINAL, AN EMITTER TERMINAL AND A COLLECTOR TERMINAL, MEANS CONNECTING THE OUTPUT TERMINAL OF SAID DIRECT COUPLED AMPLIFIER TO THE BASE TERMINAL OF SAID TRANSISTOR, MEANS CONNECTING A FIRST TERMINAL OF SAID TRANSISTOR OTHER THAN SAID BASE TERMINAL TO THE COMMON TERMINAL OF SAID DIRECT COUPLED AMPLIFIER, A POTENTIAL SOURCE HAVING A POSITIVE TERMINAL, A NEGATIVE TERMINAL AND A COMMON TERMINAL, MEANS CONNECTING THE POSITIVE AND NEGATIVE TERMINALS OF SAID POTENTIAL SOURCE TO SUPPLY POTENTIALS FOR THE ELEMENTS OF SAID DIRECT COUPLED AMPLIFIER AND MEANS CONNECTING THE COMMON TERMINAL OF SAID POTENTIAL SOURCE TO THE COMMON TERMINAL OF SAID DIRECT COUPLED AMPLIFIER, MEANS PROVIDING A FIRST SOURCE OF DIRECT CURRENT HAVING A PAIR OF TERMINALS, MEANS CONNECTING SAID FIRST TERMINAL OF SAID TRANSISTOR TO A FIRST TERMINAL OF SAID CURRENT SOURCE, MEANS CONNECTING A SECOND TERMINAL OF SAID TRANSISTOR OTHER THAN SAID BASE TERMINAL TO A SECOND TERMINAL OF SAID CURRENT SOURCE, THE OUTPUT SIGNAL OF SAID SIGNAL AMPLIFIER APPEARING BETWEEN SAID FIRST TERMINAL OF SAID TRANSISTOR AND THE SECOND TERMINAL OF SAID CURRENT SOURCE, MEANS CONNECTING THE FIRST TERMINAL OF SAID TRANSISTOR TO ONE OUTPUT TERMINAL OF SAID SIGNAL AMPLIFIER, AND MEANS CONNECTING THE SECOND TERMINAL OF SAID CURRENT SOURCE TO THE SECOND INPUT TERMINAL AND TO THE OTHER OUTPUT TERMINAL OF SAID SIGNAL AMPLIFIER.
Claim 2
Dependent Claim
271 words
AN ELECTRICAL SIGNAL AMPLIFIER HAVING A PAIR OF INPUT AND A PAIR OF OUTPUT TERMINALS COMPRISING, IN COMBINATION, A DIRECT COUPLED AMPLIFIER, HAVING AN INPUT TERMINAL, AN OUTPUT TERMINAL AND A COMMON TERMINAL, MEANS CONNECTING SAID DIRECT COUPLED AMPLIFIER INPUT TERMINAL TO A FIRST OF SAID SIGNAL AMPLIFIER INPUT TERMINALS, A TRANSISTOR HAVING A BASE TERMINAL, AN EMITTER TERMINAL AND A COLLECTOR TERMINAL, MEANS CONNECTING THE OUTPUT TERMINAL OF SAID DIRECT COUPLED AMPLIFIER TO THE BASE TERMINAL OF SAID TRANSISTOR, MEANS CONNECTING A FIRST TERMINAL OF SAID TRANSISTOR OTHER THAN SAID BASE TERMINAL TO THE COMMON TERMINAL OF SAID DIRECT COUPLED AMPLIFIER, A POTENTIAL SOURCE HAVING A POSITIVE TERMINAL, A NEGATIVE TERMINAL AND A COMMON TERMINAL, MEANS CONNECTING THE POSITIVE AND NEGATIVE TERMINALS OF SAID POTENTIAL SOURCE TO SUPPLY POTENTIALS FOR THE ELEMENTS OF SAID DIRECT COUPLED AMPLIFIER AND MEANS CONNECTING THE COMMON TERMINAL OF SAID POTENTIAL SOURCE TO THE COMMON TERMINAL OF SAID DIRECT COUPLED AMPLIFIER, MEANS PROVIDING A FIRST SOURCE OF DIRECT CURRENT HAVING A PAIR OF TERMINALS, MEANS CONNECTING SAID FIRST TERMINAL OF SAID TRANSISTOR TO A FIRST TERMINAL OF SAID CURRENT SOURCE, MEANS CONNECTING A SECOND TERMINAL OF SAID TRANSISTOR OTHER THAN SAID BASE TERMINAL TO A SECOND TERMINAL OF SAID CURRENT SOURCE, THE OUTPUT SIGNAL OF SAID SIGNAL AMPLIFIER APPEARING BETWEEN SAID FIRST TERMINAL OF SAID TRANSISTOR AND THE SECOND TERMINAL OF SAID CURRENT SOURCE, MEANS CONNECTING THE FIRST TERMINAL OF SAID TRANSISTOR TO ONE OUTPUT TERMINAL OF SAID SIGNAL AMPLIFIER, AND MEANS CONNECTING THE SECOND TERMINAL OF SAID CURRENT SOURCE TO THE SECOND INPUT TERMINAL AND TO THE OTHER OUTPUT TERMINAL OF SAID SIGNAL AMPLIFIER.
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |