High dynamic range device for integrating an electrical current
US10199990B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Sep 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for integrating an electric current during a period Tint, including an operational amplifier and a capacitor connected between a first input and an output of the amplifier, a second input of the amplifier being taken to a voltage VBUS, output voltage Vout of the amplifier being saturated at a high voltage VsatH and a low voltage VsatH according to the charge quantity in the capacitor. The device also includes: a circuit for switching the terminals of the capacitor; and a circuit for triggering the circuit at least once during period Tint when voltage Vout both grows and is substantially equal to a reference voltage VREF, the voltage VREF being smaller than or equal to voltage VsatH, and reference voltage VREF and voltage VBUS being selected to comply with relation 2·VBUS−VREF≥VsatL; and a storage circuit for storing the number of triggerings having occurred between the initial time and the end time of the integration period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.