Patent US2671903A successfully refreshed from Google Patents.
Patent US3360736A successfully refreshed from Google Patents.
US3360736A
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Two input field effect transistor amplifier
Assignee: Hitachi Ltd
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Filing: 1964-09-09
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Granted: 1967-12-26
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Expires: 1984-09-09
Abstract
No abstract record available.
Inventors
- 👤 Nagata Minoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:07
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/16; H03F3/45; H03F3/45071; H03F3/45076; H03F3/45179
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN APPARATUS FOR AMPLIFYING AN INPUT SIGNAL INCLUDING SUBSTANTIALLY LOW FREQUENCY AND HIGH FREQUENCY COMPONENTS, WHICH COMPRISES (1) A FIELD EFFECT TRANSISTOR HAVING (A) A SEMICONDUCTOR SUBSTRATE OF ONE CONDUCTIVITY TYPE; (B) A CHANNEL LAYER OF OPPOSITE CONDUCTIVITY TYPE TO THAT ON SAID SEMICONDUCTOR SUNSTRATE, A PN JUNCTION BEING FORMED BETWEEN SAID SUBSTRATE AND SAID LAYER; (C) SOURCE AND DRAIN ELECTRODES PROVIDED ON SAID CHANNEL LAYER, SPACED APART FROM EACH OTHER; (D) A FIRST GATE ELECTRODE PROVIDED OVER SAID CHANNEL LAYER IN ELECTRICALLY INSULATED MANNER; (E) A SECOND GATE ELECTRODE FORMED ON THE SUBSTRATE;
Claim 2
Independent Claim
94 words
AN APPARATUS FOR AMPLIFYING AN INPUT SIGNAL INCLUDING SUBSTANTIALLY LOW FREQUENCY AND HIGH FREQUENCY COMPONENTS, WHICH COMPRISES (1) A FIELD EFFECT TRANSISTOR HAVING (A) A SEMICONDUCTOR SUBSTRATE OF ONE CONDUCTIVITY TYPE; (B) A CHANNEL LAYER OF OPPOSITE CONDUCTIVITY TYPE TO THAT ON SAID SEMICONDUCTOR SUNSTRATE, A PN JUNCTION BEING FORMED BETWEEN SAID SUBSTRATE AND SAID LAYER; (C) SOURCE AND DRAIN ELECTRODES PROVIDED ON SAID CHANNEL LAYER, SPACED APART FROM EACH OTHER; (D) A FIRST GATE ELECTRODE PROVIDED OVER SAID CHANNEL LAYER IN ELECTRICALLY INSULATED MANNER; (E) A SECOND GATE ELECTRODE FORMED ON THE SUBSTRATE;
References Cited (Backward Citations)
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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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |