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。
2
PAL chips, specially PAL22V10 or 22VP10. which have high performance', have been adopted widely in logicalcircuit 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。
3
This circuit may make a tri-state logic pen or is installed in the multimeter and the digital logical experiment box.