HIGH-PRECISION MOSFET CURRENT MEASUREMENT TECHNOLOGY WITH SWITCHING CAPACITOR

DE602020048994T2Active Publication Date: 2025-04-09ANALOG DEVICES INT UNLTD CO
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Patent Information

Application Number
DE602020048994
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-28
Filing Date
2020-05-22
Publication Date
2025-04-09
Estimated Expiration
2040-05-22

AI Technical Summary

Technical Problem

Existing integrated circuits that utilize isolated transistors as control elements face challenges in measuring current independently of the common-mode voltage, leading to inefficiencies and power dissipation due to the need for current sense resistors.

Method used

The implementation of a switched capacitor circuitry that isolates the current measurement from the common-mode voltage, using a field effect transistor (FET) and a reference transistor in a precise ratio, allows for current measurement without a series sense resistor, thereby eliminating voltage drop and power dissipation.

Benefits of technology

This solution enables current measurement that is independent of the common-mode voltage, reducing power dissipation and increasing adaptability to various voltage levels, while maintaining high accuracy and dynamic range.

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