Patent US3168709A successfully refreshed from Google Patents.
US3168709A
Expired / Lapsed
US
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Stabilized transistor difference amplifier
Assignee: Honeywell Inc
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Filing: 1960-12-14
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Granted: 1965-02-02
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Expires: 1980-12-14
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Sikorra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:44
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03F3/45484; H03F3/45488; H03F3/45493; H03F3/45502; H03F2203/00; H03F2203/45; H03F2203/45408; H03F2203/45418; H03F2203/45472; H03F2203/45498; H03F2203/45594; H03F2203/45702; H03F2203/45712
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
APPARATUS OF THE CLASS DESCRIBED COMPRISING: A FIRST AND SECOND DIRECT COUPLED DIFFERENCE AMPLIFIERS, SAID SECOND DIFFERENCE AMPLIFIER HAVING AN IMPEDANCE IN SERIES WITH THE D.C. OUTPUT THEREOF SO THAT THE QUIESCENT OPERATING CURRENT OF SAID SECOND AMMPLIFIER FLOWS THROUGH SAID IMPEDANCE; AND VOLTAGE REGULATING MEANS CONNECTING THE D.C. OUTPUT OF SAID FIRST DIFFERENCE AMPLIFIER TO SAID IMPEDANCE SO THAT THE QUIESCENT OPERTING CURRENT OF SAID FIRST AMPLIFIER ALSO FLOWS THROUGH SAID IMPEDANCE, SAID REGULATING MEANS FURTHER HOLDING THE VOLTAGE ACROSS SAID IMPEDANCE CONSTANT SO THAT THE OPERATING POINTS OF SAID FIRST AND SECOND AMPLIFIERS REMAIN STABLE.
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |