非线性集成电路规范的分段线性化宏模型

承接文献[1]所推导的非线性器件规范的分段线性化模型，本文在此基础上将其进一步推广。根据宏模型的特点，建立任一非线性集成电路分段线性化宏模型．其特点是在一定精度范围内，其端口特性和原子网络的端口特性相同或近似相同．

An Integrated Tool for Power/Ground Network Design, Optimization,and Verification for Cell Based VLSIs

A CAD tool based on a group of efficient algorithms to verify,design,and optimize power/ground networks for standard cell model is presented.Nonlinear programming techniques,branch and bound algorithms and incomplete Cholesky decomposition conjugate gradient method (ICCG) are the three main parts of our work.Users can choose nonlinear programming method or branch and bound algorithm to satisfy their different requirements of precision and speed.The experimental results prove that the algorithms can run very fast with lower wiring resources consumption.As a result,the CAD tool based on these algorithms is able to cope with large-scale circuits.

自制电磁波发射接收演示仪

为了在实验中更明显地演示电磁波的发射和接收,笔者曾用NE555集成电路组成振荡发射部分。如图1,经过多次实验,发射频率稳定性好,发射距离在10米以上。可满足课堂教学演示和劳技课的实验教学。接收部分采用图2的装置,制成一个简易场强计,通过电流表的指针偏转情况反映接收电磁波的强弱,比较直观,即使在阴雨天,发射接收均可实施。