Current sampling circuit and method
US9766274B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2014 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Feb 8, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/687
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a current sampling circuit including a proportional current output circuit and a full differential common mode negative feedback circuit, specifically the proportional current output circuit is configured to calculate a current output from a power device according to a preset proportion to obtain a first proportional current and a second proportional current, and to output the first proportional current and the second proportional current to the full differential common mode negative feedback circuit; and the full differential common mode negative feedback circuit is configured to shunt respectively the first proportional current and the second proportional current using a full differential common mode negative feedback network with a bias current in microamps to obtain a first sampling current and a second sampling current, and to output constantly the first sampling current and the second sampling current. Further disclosed is a current sampling method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.