US3891840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low leakage current integrator
Assignee: Information Storage Systems Inc
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Filing: 1973-12-14
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Granted: 1975-06-24
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Expires: 1993-12-14
Abstract
Abstract A current integrator for performing the function having very low current leakage.
Inventors
- 👤 Robert L Cloke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:29
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A current integrator capable of performing the function 1/c integral I dt, said integrator comprising: first and second integrator input terminals and first and second integrator output terminals; a capacitor having first and second terminals; first and second transistors with the collectors thereof interconnected with the first terminal of the capacitor; an isolation amplifier having a gain of unity and having input and output terminals; circuit means connecting the first terminal of the capacitor to the amplifier input terminal; circuit means connecting the bases of the first and second transistors, the output of the amplifier and the first integrator output terminal; circuit means connecting the capacitor second terminal with the second integrator output terminal; circuit means connecting the first and second integrator input terminals to the first and second transistor collectors respectively whereby electric current transmitted to the integrator input terminals will result in a voltage signal at the integrator output terminals which is the integral of the differences in the current received at the integrator input terminals.
Claim 2
Dependent Claim
168 words
A current integrator capable of performing the function 1/c integral I dt, said integrator comprising: first and second integrator input terminals and first and second integrator output terminals; a capacitor having first and second terminals; first and second transistors with the collectors thereof interconnected with the first terminal of the capacitor; an isolation amplifier having a gain of unity and having input and output terminals; circuit means connecting the first terminal of the capacitor to the amplifier input terminal; circuit means connecting the bases of the first and second transistors, the output of the amplifier and the first integrator output terminal; circuit means connecting the capacitor second terminal with the second integrator output terminal; circuit means connecting the first and second integrator input terminals to the first and second transistor collectors respectively whereby electric current transmitted to the integrator input terminals will result in a voltage signal at the integrator output terminals which is the integral of the differences in the current received at the integrator input terminals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |