Differential current sensing with robust path, voltage offset removal and process, voltage, temperature (PVT) tolerance
US11047946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2018 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | May 29, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Aspects of the disclosure are directed to voltage-based current sensing. In accordance with one aspect, voltage-based current sensing may include performing a coarse calibration of a voltage based current sensor to determine a coarse offset; performing a fine calibration of the voltage based current sensor to determine a fine offset; performing a frequency calibration of the voltage based current sensor to determine a frequency offset; and performing a transfer function calibration of the voltage based current sensor to determine a sensor transfer function using one or more of the coarse offset, the fine offset and the frequency offset; and measuring a load current using the sensor transfer function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.