US3555443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure of integrated circuit
Assignee: NEC Corp
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Filing: 1968-11-26
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Granted: 1971-01-12
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Expires: 1988-11-26
Abstract
Abstract A CASCADE CONNECTED INTEGRATED CIRCUIT AMPLIFIER IS DESCRIBED WHEREIN THE GROUN RETURN CIRCUITS OF DISTINCT AMPLIFIER STAGES ARE SELECTIVELY SIZED AND SHAPED AND INTERCONNECTED TO A GROUND PAD TO MINIMIZE FEEDBACK EFFECTS. THE GROUND PAD MAY BE SELECTIVELY LOCATED ADJACENT ANY STAGE WITH THE GROUND RETURN CIRCUITS CORRESPONDINGLY MODIFIED IN CROSS-SECTION TO REDUCE FEEDBACK EFFECTS, WHETHER THESE BE NEGATIVE OR POSITIVE. SEVERAL EMBODIMENTS ARE DESCRIBED.
Inventors
- 👤 Masanobu Tsugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:21
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/347
Claims Analysis
Total Claims: 0
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |