问题描述
IEEE Std 1800™-2012 第 4.9.5 节说交换处理应考虑双向交换连接网络中的所有设备，然后才能为网络上的任何节点确定合适的值，因为输入和输出相互作用.模拟器可以使用放松技术来做到这一点."
IEEE Std 1800™-2012 section 4.9.5 says "Switch processing shall consider all the devices in a bidirectional switch-connected net before it candetermine the appropriate value for any node on the net because the inputs and outputs interact. A simulator can do this using a relaxation technique."
LRM 所指的松弛技术是什么?哪里可以看到详细的松弛算法?
What is this relaxation technique the LRM is referring to? Where can I read the detailed relaxation algorithm?
推荐答案
双向开关本质上是一种模拟设备.尝试在基于离散事件的数字模拟器中模拟此类设备会带来相当大的挑战.该设备可以创建许多事件反馈循环，并且松弛算法可以防止无休止的零延迟评估循环.该标准没有指定该算法的实际实现，但大多数模拟器使用派生自 这篇论文.
A bidirectional switch is inherently an analog device. Trying to simulate this kind of device in a discrete event based digital simulator creates quite a challenge. This device can create many event feedback loops and the relaxation algorithm is there to prevent endless zero-delay loops of evaluation. The standard does not specify the actual implementation of this algorithm, but most simulators use ones derived from this paper by Randy Bryant.
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