总体分为两部分：数字控制逻辑电路和模拟宏单元电路。
They are divided into two parts: digital control logic circuits and analog macro circuits.
这种热水器应该配置控制逻辑电路，当出现无水或水位太低状况时，能够自动关闭加热元件的电源。
The unit shall be equipped with control logic that shuts down all electricity to the heating elements in the event of no water or low water levels in the tank.
本文给出了一用于跟踪控制的单板微计算机硬件设计方法及其具体逻辑电路。
The hardware designing method and the concrete logic circuit of single board microcomputer for tracking controll are given.
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