According to the current situation and prospect of applying OET in substation automation, the opinion of digital electro-optical secondary circuit is given out.

结合光电传感器在变电站自动化系统中的应用现状和前景，提出了二次回路光电数字化的设想。

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In the circuit design, unit current source arrays and digital synchronizing cells are used to improve the matching and dynamic range of DAC.

电路设计中使用单位电流源阵列和数字同步控制单元来提高电流源的匹配性和动态范围；

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The digital display circuit using a figure panel instrument was designed to implement real-time display of the Settings and the voltage and current in the welding process.

设计的数字化显示电路，采用数字面板表进行显示。在参数预置时显示参数预置值，在焊接过程中显示焊接电压与电流。

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