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Design of a Multi-Channel Expandable High-Precision Isolated Current Source Module
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Journal Article
Design of a Multi-Channel Expandable High-Precision Isolated Current Source Module
2021
Overview
Small current source module has low accuracy, big ripple and cannot be used for multi-channel expansion and isolated output. In view of this, a high-precision isolated current source module for multi-channel expansion is designed. The current source module consists of an isolated power supply circuit, an A/D conversion circuit, a linear current stabilizer circuit, and a digital isolation circuit. MCU can implement control of the module through only three ordinary IO ports, and one MCU can simultaneously control multiple current source modules to complete multi-channel isolated output. The output accuracy of each channel can reach a level of 0.001mA.
Publisher
IOP Publishing
Subject
