送交者: neo6 于 2004-12-29, 13:37:23:
同一块土地上，在牛顿去世100余年之后，法拉第发现了电磁感应定律，麦
克斯韦和赫兹则发展了电磁学。杨先生做了一个假设：如果没有电磁感应等规律
和对电磁性能计算的掌握，原型计算机中那么多复杂的电路该如何布线？从科技
史的角度讲，电磁理论显然是走在了计算机发明的前面。
the early computer clock is very slow, should be less than 10MHz. at such frequency, they do not need to consider signal integrity issues when doing PCB layout, therefore they do not need to be expert of EM theory to do that. Here Yang made an mistake since he is not an electronics engineer