VDS equalizer offset compensation for a current sense circuit
US10041983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2015 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Sep 20, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0054
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current sense circuit for a pass transistor is described. The current sense circuit comprises a sense transistor, a differential amplifier comprising a differential input and a differential output, and a differential difference amplifier, referred to as DD amplifier, comprising a main differential input, an auxiliary differential input and an output; wherein the differential output of the differential amplifier is coupled to the auxiliary differential input of the DD amplifier; wherein the output port of the pass transistor is coupled to a first port of the main differential input and wherein the output port of the sense transistor is coupled to a second port of the main differential input. The output of the DD amplifier is used to control a voltage drop across the sense transistor and the pass transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.