Accurate and efficient sensing method for bi-directional signals
US7071677B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2005 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Dec 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/203
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exemplary method and circuit for sensing bi-directional current through a resistive element comprises a sampling unit, a charge transfer unit, and an amplifier. The sampling unit is switchably coupled to the resistive element and samples and stores a voltage corresponding to a current flowing through the resistive element. The charge transfer unit switchably connects the sampling unit to the amplifier such that the charge transfer unit and the amplifier convert the sampled voltage to a ground-referenced output voltage corresponding to the magnitude of the current and in accordance with the direction of the current through resistive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.