模拟技术在数字技术中的应用

Application of Simulation Technique to Digital Technology

由于数字电路是利用上升沿/下降沿很短的脉冲信号,所以会向外部放出包括高频成分的多余电磁波(噪声),而且对外部来的电磁波(噪声)敏感地响应,造成误动作。另外在电路内部也存在线间产生交调失真及数字器件的通/断时电流急骤变化引起电源电压变动等问题。而解决这些问题的手段都是模拟技术。

Owing to use of very short positive - going edge / negative edge impulse signal, the digital circuit may emit redundant electromagnetic wave （noise） including high frequency content to the external, at the same time respond subtlely to the electromagnetic wave （noise） from the external that leads to its malfunction.In addition, inside circuit there exist Line - to - Line crosstalk and supply voltage variation caused by sudden change of electric current while the digital device is on/off and other problems. All these problems will be solved by simulation technique.