US3713031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bootstrapped charge-sensitive low noise amplifier
Assignee: Ortec Inc
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Filing: 1970-09-29
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Granted: 1973-01-23
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Expires: 1990-09-29
Abstract
Abstract WHEN USED WITH A CAPACITIVE TRANSDUCER INPUT, THE OVERALL NOISE FIGURE OF AN IMPLIFER SYSTEM IS SIGNIFICANTLY REDUCED BY MAKING USE OF THE COMBINED FUNCTIONS OF BOOTSTRAPPING AND CHARGE SENSIVITY OF THE INPUT ACTIVE DEVICE.
Inventors
- 👤 C Williams
- 👤 D Gedcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:51
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F3/00; H03F3/70; H03F2200/00; H03F2200/372
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |