Patent US3289093A successfully refreshed from Google Patents.
US3289093A
Expired / Lapsed
US
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A. c. amplifier using enhancement-mode field effect devices
Assignee: Fairchild Semiconductor Corp
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Filing: 1964-02-20
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Granted: 1966-11-29
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Frank M Wanlass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
H; H10; H10D; H10D1/00; H10D1/40; H10D1/47; H10D84/00; H10D84/80; H10D84/811; H10D84/817; H10D88/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN A.-C. AMPLIFIER COMPRISING: A PLURALITY OF INSULATED-GATE-EFFECT SEMICONDUCTOR DEVICES CAPABLE OF OPERATION IN THE ENHANCEMENT MODE, EACH HAVING A GATE, A SOURCE A DRAIN, AND A LOAD RESISTOR CONNECTED IN SERIES WITH ITS DRAIN, THE FREE TERMINALS OF EACH OF SAID LOAD RESISTORS BEING CONNECTED TOGETHER AND THE SOURCES OF SAID DEVICES BEING COMMON, SAID DEVICES BEING CASCADED, THE DRAIN OF ONE BEING COUPLED TO THE GATE OF THE NEXT, SAID DEVICE ACTING AS A CASCADED AMPLIFIER WITH THE GATE OF THE FIRST INPUT AND THE DRAIN OF THE LAST BEING THE OUTPUT; A FIXED RESISTOR DIRECTLY COUPLING SAID GATE OF THE FIRST DEVICE AND SAD DRAIN OF THE LAST DEVICE; MEANS INCLUDING AN INPUT TERMINAL AND A COUPLING CAPACITOR FOR A.-C. COUPLING AN INPUT SIGNAL TO SAID GATE OF SAID FIRST DEVICE; MEANS FOR PASSING A CURRENT BETWEEN SAID CONNECTED FREE RESISTOR TERMINALS AND SAID COMMON SOURCES; AND OUTPUT MEANS COUPLED TO SAID DRAIN OF THE LAST DEVICE FOR COUPLING THE AMPLIFIED OUTPUT SIGNAL OF THE AMPLIFIER TO EXTERNAL CIRCUITRY.
Claim 2
Dependent Claim
172 words
AN A.-C. AMPLIFIER COMPRISING: A PLURALITY OF INSULATED-GATE-EFFECT SEMICONDUCTOR DEVICES CAPABLE OF OPERATION IN THE ENHANCEMENT MODE, EACH HAVING A GATE, A SOURCE A DRAIN, AND A LOAD RESISTOR CONNECTED IN SERIES WITH ITS DRAIN, THE FREE TERMINALS OF EACH OF SAID LOAD RESISTORS BEING CONNECTED TOGETHER AND THE SOURCES OF SAID DEVICES BEING COMMON, SAID DEVICES BEING CASCADED, THE DRAIN OF ONE BEING COUPLED TO THE GATE OF THE NEXT, SAID DEVICE ACTING AS A CASCADED AMPLIFIER WITH THE GATE OF THE FIRST INPUT AND THE DRAIN OF THE LAST BEING THE OUTPUT; A FIXED RESISTOR DIRECTLY COUPLING SAID GATE OF THE FIRST DEVICE AND SAD DRAIN OF THE LAST DEVICE; MEANS INCLUDING AN INPUT TERMINAL AND A COUPLING CAPACITOR FOR A.-C. COUPLING AN INPUT SIGNAL TO SAID GATE OF SAID FIRST DEVICE; MEANS FOR PASSING A CURRENT BETWEEN SAID CONNECTED FREE RESISTOR TERMINALS AND SAID COMMON SOURCES; AND OUTPUT MEANS COUPLED TO SAID DRAIN OF THE LAST DEVICE FOR COUPLING THE AMPLIFIED OUTPUT SIGNAL OF THE AMPLIFIER TO EXTERNAL CIRCUITRY.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |