US3560866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
If amplifier with compensated transistor unit
Assignee: Sprague Electric Co
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Filing: 1968-08-20
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Granted: 1971-02-02
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Expires: 1988-08-20
Abstract
Abstract AN INTEGRATED BRIDGE NETWORK OF TWO TRANSISTOR PAIRS IS USED AS THE ACTIVE DEVICE IN A TUNED DIFFERENTIAL IF AMPLIFIER STAGE. THE TRANSISTORS ARE SO FABRICATED AND INTERCONNECTED AS TO PROVIDE NEUTRALIZATION OF THE INTERNAL COLLECTOR-TO-BASE CAPACITIVE FEEDBACK. VARIATIONS OF THE RELATIVE BIAS CURRENT LEVELS OF THE TRANSISTOR PAIR PRODUCE AUTOMATIC GAIN CONTROL FOR THE STAGE WITH MINIMAL FREQUENCY RESPONSE VARIATIONS.
Inventors
- 👤 George W Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:33
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017; H03G1/0023; H03F; H03F3/00; H03F3/189; H03F3/19; H03F3/195; H10; H10D; H10D99/00
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |