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The Design of Digital Direct Current Source Based on Nios II

机译:基于Nios II的数字直流源设计

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In this paper, a digital direct current source based on Nios II is studied. The system adopts FPGA as hard core and the main circuit of constant current source consisting of operational amplifier LM358 and power Field Effect Transistor (FET) IRF530. In addition, 12 bit D/A chip MAX531 and 12 bit A/D chip TLC549 are used to monitor the output current. The system outputs current from 20 mA to 2000 mA with 0.5 mA step level, the set current value and actual output current value can be displayed by LCD. Result shows that the system has characteristics of high precision, good stability, small size and high integration.
机译:本文研究了基于NIOS II的数字直流源。该系统采用FPGA作为硬核和主电路的恒流源,包括运算放大器LM358和电源场效应晶体管(FET)IRF530。另外,12位D / A芯片MAX531和12位A / D芯片TLC549用于监控输出电流。系统输出电流从20 mA到2000 mA,液晶显示屏可以显示设定电流值和实际输出电流值。结果表明,该系统具有高精度,稳定性,小尺寸和高集成度的特点。

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