【正文】 able Logic Device that is, as a large scale integrated circuits can be constructed according to the needs of users on their own logic, enabling largescale circuit design, it is widely used in product design and prototype production into. Almost all applications of small and medium generalpurpose digital integrated circuits may be applied CPLD devices occasions. This article describes the msequence generator based on CPLD design method. Key words: CPLD； MAX+PLUS II； Pseudorandom Code； m sequence code Generator 3 目 錄 前言 ................................................................................................................................ 6 1 課題介紹 .....................................................................................................................7 為什 么研究此課題 ............................................................................................7 偽隨機序列的應(yīng)用與意義 ..................................................................................................7 偽隨機序列的研究現(xiàn)狀 ......................................................................................................8 研究內(nèi)容 ..............................................................................................................................8 2 設(shè)計中使用芯片及 VHDL 語言介紹 ...........................................................................................9 CPLD芯片介紹 ...................................................................................................................9 概述 .............................................................................................................................9 MAX7000 特點 ..........................................................................................................9 EPM7128LC847......................................................................................................11 3 偽隨機序列介紹 ......................................................................................................12 偽隨機序列理論的發(fā)展史 .................................................................................................13 偽隨機序列的構(gòu)造方法 .....................................................................................................13 4 序列信號發(fā)生器原理 .............................................................................................. 14 序列信號發(fā)生器的設(shè)計 ................................................................................. 15 反饋移位型序列信號發(fā)生器 ...............................................................15 計數(shù)型序列碼發(fā)生器 ............................................................................ 18 5 移位寄存器 ............................................................................................................20 移位寄存器 .....................................................................................................20 寄存器 ...................................................................................................20 移位寄存器 ............................................................................................21 線 性反饋移位寄存器結(jié)構(gòu) ............................................................................22 D 觸發(fā)器 ................................................................................................22 D 觸發(fā)器工作原理 .......................................................................22 D 觸發(fā)器真值表 ...........................................................................23 特征方程 ......................................................................................23 狀態(tài)轉(zhuǎn)移圖 ..................................................................................23 時序圖 ...........................................................................................24 脈沖特性 ......................................................................................24 異或門 ....................................................................................................25 基本原理 ......................................................................................25 異或門邏輯符號 ..........................................................................25 邏輯表達式 ..................................................................................25 真值表 ..........................................................................................25 線性反饋移位寄存器 ....................................................................................26 什么是反饋移位寄存器 .....................................................................26 線性反饋移位寄存器 .........................................................................26 性質(zhì) ...................................................................................................26 6 偽隨機信號 ..............................................................................................................27 偽隨機信號 ...................................................................................................27 4 m序列碼發(fā)生器 ............................................................................................30 7 m序列性質(zhì) ...............................................................................................................33 均衡性 ...........................................................................................................33 .........................................................................................................33 移位相加性 ...................................................................................................33 相關(guān)特性 .......................................................................................................33 偽隨機特性 ...................................................................................................34 8 序列信號發(fā)生器的設(shè)計和仿真實現(xiàn) ..................................................