US3559084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signal attenuation network
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1967-12-29
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Granted: 1971-01-26
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Expires: 1987-12-29
Abstract
Abstract A VIDEO SIGNAL ATTENUATOR HAVING COMPLEMENTARY TRANSISTOR PAIRS TO ATTENUATE A VIDEO SIGNAL BY A FACTOR DETER MINED BY AN APPLIED CONTROL VOLTAGE. EACH TRANSISTOR PAIR RECEIVES THE INPUT VIDEO SIGNAL AND EFFECTS ACROSS AN OUTPUT RESISTIVE MATRIX VIDEO SIGNALS AS ATTENUATED WITHOUT DISTROTION BUT OF SUBSTANTIALLY EQUAL AMPLITUDE AND POLARITY, AND DIRECT CURRENT SIGNALS OF SUBSTANTIALLY EQUAL AMPLITUDE AND OPPOSITE POLARITY SO THAT LOW FREQUENCY TRANSIENT SIGNALS OCCASINED BY VARIATIONS OF THE CONTROL VOLTAGE DO NOT APPEAR AT THE OUTPUT WITH THE ATTENUATED VIDEO SIGNALS.
Inventors
- 👤 Richard S Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:00
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017; H03G1/0023
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |