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Memory Mapped In-line DC Current Sensor

IP.com Disclosure Number: IPCOM000012649D
Original Publication Date: 2003-May-19
Included in the Prior Art Database: 2003-May-19

Publishing Venue

IBM

Abstract

A simple and fast memory mapped current sensor is presented using voltage comparators, a latch, and various passives. In contrast to Analog to Digital converter solutions, this system is comparatively inexpensive and extremely fast, but suffers from decreased accuracy. This simple current sensor is useful in applications such as motor drives and uninterruptible power supplies, where knowing load current may not be necessary for operation, but predefined current trip points are present which indicate certain fault scenarios.