The Design of Digital Direct Current Source Based on Nios II

Qing Qing Fu; Ai Ping Wu

doi:10.4028/www.scientific.net/AMM.313-314.316

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 313-314The Design of Digital Direct Current Source Based...

The Design of Digital Direct Current Source Based on Nios II

Abstract:

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 20mA to 2000mA with 0.5mA 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.

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Periodical:

Applied Mechanics and Materials (Volumes 313-314)

Pages:

316-319

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.313-314.316

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Online since:

March 2013

Authors:

Qing Qing Fu, Ai Ping Wu

Keywords:

Constant Current Source, Field-Programmable Gate Array (FPGA), Nios II, VHDL

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