US3404347A
Expired / Lapsed
US
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Gain controlled amplifier using multiple gate field-effect transistor as the active element thereof
Assignee: RCA Corp
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Filing: 1966-11-03
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Granted: 1968-10-01
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Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Kaplan
- 👤 Oliver P Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03F; H03F3/00; H03F3/189; H03F3/19; H03F3/193
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
IN AN AMPLIFIER CIRCUIT OF THE TYPE INCLUDING A FIELD-EFFECT TRANSISTOR HAVING SOURCE, DRAIN AND A PLURALITY OF GATE ELECTRODES, MEANS COUPLED BETWEEN ONE OF SAID GATE ELECTRODES AND SAID SOURCE ELECTRODE PROVIDING A TUNED SIGNAL INPUT CIRCUIT, AND MEANS COUPLED BETWEEN THE DRAIN AND SOURCE ELECTRODES PROVIDING A TUNED SIGNAL OUTPUT CIRCUIT, THE IMPROVEMENT COMPRISING: GAIN CONTROLLING POTENTIAL MEANS COUPLED TO ANOTHER OF SAID GATE ELECTRODES FOR CONTROLLING THE GAIN OF SAID AMPLIFIER CIRCUIT AS A FUNCTION OF THE AMPLITUDE OF SAID GAIN CONTROLLING POTENTIAL; AND CIRCUIT MEANS COUPLING A PORTION OF SAID GAIN CONTROLLING POTENTIAL TO SAID ONE GATE ELECTRODE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |