In the application of above 24V fort current voltage grade control circuit, Voltage Alternating and resonant wave interference of input model for Programmable Logic Controllers must be resolved.
可编程控制器在高于24V的直流电压等级控制回路中应用时需解决输入模块的电压变换和谐波干扰等问题。
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Presented in this paper is a digital AGC circuit that is constituted with digital attenuator DAC0832. Its controlled grade can reach 256 and the external circuit is very simple.