In other words, the circuit may be physical two - wire (or even physical one - wire) and logical four - wire, performing as a four - wire circuit but employing fewer than four wires.
换句话说，电路可以是物理双线(甚至是物理单线)、逻辑四线，它使用较少的线实现四线电路。
PAL chips, specially PAL22V10 or 22VP10. which have high performance', have been adopted widely in logical circuit design.
PAL器件，尤其是高性能的PAL22V10或者22VP10在最新的逻辑电路设计中广泛被采用。
This circuit may make a tri-state logic pen or is installed in the multimeter and the digital logical experiment box.
该电路可做成三态逻辑笔或装置在万用表、数字逻辑实验箱中使用。
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