※ 引述《pow (体脂肪35%)》之铭言： : 标题: Re: 传输线大哉问～ : 时间: Wed Feb 7 14:40:06 2007 : : : Can KVL and KCL explain the charge forming the channel of a nFET? : : -- :

※ 发信站: 批踢踢实业坊(ptt.cc) : ◆ From: 152.14.55.70 : 推 terrywei:如果能将等效电路推倒出来 就可以 140.138.136.188 02/07 15:31 : 推 sexyman:原 po 这问题纯粹是在刁难人，你只要能 140.112.19.162 02/07 15:32 : → sexyman:定义出等效电路就可以，问题是等效电路 140.112.19.162 02/07 15:34 : → sexyman:为何，不是由 KVL 跟 KCL 去解释的 140.112.19.162 02/07 15:35 This is my opinoin: I think "等效电路" is the bug here. Looks like everybody has been brain-washed by SPICE, where you always need to find a equivalent circuit that contains only primitives to model something. You can't always find a "等效电路". What about a balun or hybrid? Anything more than 2 port is beyond the capability of SPICE. The way we can simulate a most basic transformer in SPICE is....by putting a big resistor across the two floating node and set one as reference. Why? because the simulator won't work if there's no KCL. The resistor will cause error definitely. If it's not tolerable, you'll get a "internal time step too small" error and screwed up pretty bad. So 等效电路 won't always work if you stick with KVL and KCL all the time. --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 152.14.55.70