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本文提出一种用于微机继电保护的ＣＰＵ主板的新设计方法。用一片８０Ｃ１９６ＫＢ（ＣＰＵ）和两片ＡＤ７７９ＫＮ（ＡＤＣ）实现了８路电力参数信号的近似同相位的数据采集，系统分辨率为１４位。
In this paper, a new design method of CPU motherboard for microprocessor relay protection is proposed. With an 80C196KB (CPU) and two AD779KNs (ADCs), an approximate, in-phase data acquisition of the 8-way power parameter signals is achieved with a system resolution of 14 bits.