Implementation of Demodulator for an Analog HART Chip

HART调制解调器芯片以其与微处理器的接口简单、功耗低,被广泛的应用于HART智能仪表中。本文根据HART协议的规范,应用一个带通滤波器和一个比较器来实现HART模拟芯片的解调功能,并且通过了仿真验证,最后布局布线完成整个电路的实现

ANALYSIS OF NANO CHANNEL FORMATION IN QUARTZ CUBES BY LASER-INDUCED PROCESS

A novel laser processing technique was developed for making channels in the nanoregime in this paper.A Nd:YAG laser was used to dry fabricate micro channels(25μm～100μm di-ameter)in a 1 cm~3 fused silica substrate by thermal-induced processing.By controlling the locationsof these initiating micro..