Inductor-based current sensing
US7235962B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Nov 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/2513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for sensing a current in an inductor is described. Integrator circuitry is operable to generate a first signal representing an integration of a voltage across the inductor. Comparison circuitry is operable to generate a reset signal each time the first signal reaches either a positive or negative threshold. The reset signal is for resetting the integrator circuitry. Logic circuitry is operable to generate a count direction signal indicating which of the positive and negative thresholds was reached to generate the reset signal. Counter circuitry is operable to increment or decrement a count representing the current in the inductor in response to the reset and count direction signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.