0010、比较全面的手机原理资料.rar_存储_其他

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6298b4046c497022d705cfc7/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6298b4046c497022d705cfc7/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0"> <span class="ff2 fs1 sc1">图<span class="ff3 sc0"> 1-48</span></span></div><div class="t m0 x1 h4 y3 ff2 fs0 fc0 sc0 ls0 ws0">信号<span class="_ _0"> </span><span class="ff1">4<span class="_ _0"> </span></span>是经逻辑电路一系列处<span class="_ _1"></span>理后<span class="_ _1"></span><span class="ff1">,</span>分离<span class="_ _1"></span>输出的<span class="_ _0"> </span><span class="ff1">TXI/Q<span class="_ _0"> </span></span>波形。<span class="ff1">TXI/Q<span class="_ _0"> </span></span>信号如图<span class="_ _0"> </span><span class="ff1">1-48<span class="_ _0"> </span></span>所示<span class="ff1">,</span></div><div class="t m0 x2 h4 y4 ff2 fs0 fc0 sc0 ls0 ws0">这<span class="_ _1"></span>两幅<span class="_ _1"></span>图<span class="_ _1"></span>分<span class="_ _1"></span>别是<span class="_ _1"></span>用<span class="_ _2"> </span><span class="ff1">100MHz<span class="_"> </span></span>数字示<span class="_ _1"></span>波<span class="_ _1"></span>器<span class="_ _1"></span>与<span class="_ _2"> </span><span class="ff1">20 MHz<span class="_"> </span></span>示波<span class="_ _1"></span>器<span class="_ _1"></span>所测<span class="_ _1"></span>得<span class="_ _1"></span>的<span class="_ _2"> </span><span class="ff1">TXI/Q<span class="_ _0"> </span></span>波<span class="_ _1"></span>形，<span class="_ _1"></span>真<span class="_ _1"></span>正<span class="_ _1"></span>的发</div><div class="t m0 x2 h4 y5 ff2 fs0 fc0 sc0 ls0 ws0">送信息只是包含在<span class="_ _0"> </span><span class="ff1">I/Q<span class="_ _3"> </span></span>波形的顶部。</div><div class="t m0 x1 h4 y6 ff2 fs0 fc0 sc0 ls0 ws0">信号<span class="_ _0"> </span><span class="ff1">5<span class="_ _3"> </span></span>是发射已调中频信号<span class="_ _1"></span><span class="ff1">,</span>信号<span class="_ _0"> </span><span class="ff1">6<span class="_ _3"> </span></span>是发射最终信号。信号<span class="_ _0"> </span><span class="ff1">5</span>、<span class="ff1">6<span class="_ _0"> </span></span>需用频谱分析仪才能观</div><div class="t m0 x2 h4 y7 ff2 fs0 fc0 sc0 ls0 ws0">察到。</div><div class="t m0 x1 h4 y8 ff2 fs0 fc0 sc0 ls0 ws0">信号<span class="_ _3"> </span><span class="ff1">7<span class="_ _0"> </span></span>是进行功率放大后的最终发射信号。</div><div class="t m0 x1 h4 y9 ff2 fs0 fc0 sc0 ls0 ws0">只有<span class="_ _1"></span>具有<span class="_ _1"></span>发<span class="_ _1"></span>射变<span class="_ _1"></span>换功<span class="_ _1"></span>能<span class="_ _1"></span>的电<span class="_ _1"></span>路才<span class="_ _1"></span>有<span class="_ _1"></span>信号<span class="_ _4"> </span><span class="ff1">8<span class="_ _1"></span></span>。图<span class="_ _0"> </span><span class="ff1">1-49<span class="_"> </span></span>是在<span class="_ _0"> </span><span class="ff1">cd928<span class="_"> </span></span>发射变<span class="_ _1"></span>换模<span class="_ _1"></span>块<span class="_ _1"></span>输出<span class="_ _1"></span>端用</div><div class="t m0 x2 h4 ya ff2 fs0 fc0 sc0 ls0 ws0">数字示波器测得的信号<span class="ff1">,</span>该信号去控制<span class="_ _0"> </span><span class="ff1">TXVCO<span class="_ _3"> </span></span>的工作<span class="ff1">(</span>将发送数据调制在<span class="_ _3"> </span><span class="ff1">TXVCO<span class="_ _0"> </span></span>信号上<span class="ff1">)</span>。</div><div class="t m0 x2 h3 yb ff1 fs0 fc0 sc0 ls0 ws0"> <span class="ff2 fs1 sc1">图<span class="ff3 sc0"> 1-49</span></span></div></div><div class="t m0 x3 h5 yc ff1 fs1 fc0 sc0 ls0 ws0">1</div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6298b4046c497022d705cfc7/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 yd ff1 fs0 fc0 sc0 ls0 ws0"> <span class="ff2 fs1 sc1">图<span class="ff3 sc0"> 1-50</span></span></div><div class="t m0 x1 h4 ye ff2 fs0 fc0 sc0 ls0 ws0">不论是哪一<span class="_ _1"></span>种发射机电路结构<span class="_ _1"></span><span class="ff1">,TXI/Q<span class="_ _0"> </span></span>信号从逻辑音频<span class="_ _1"></span>电路输出后<span class="_ _1"></span><span class="ff1">,</span>都进入到<span class="_ _1"></span>射频电路中</div><div class="t m0 x2 h4 yf ff2 fs0 fc0 sc0 ls0 ws0">的<span class="_ _1"></span>发射<span class="_ _2"> </span><span class="ff1">I/Q<span class="_ _0"> </span></span>调<span class="_ _1"></span>制器<span class="_ _1"></span>中<span class="_ _1"></span>。<span class="_ _1"></span>在<span class="_ _2"> </span><span class="ff1">TXI/Q<span class="_ _0"> </span></span>调制<span class="_ _1"></span>器<span class="_ _1"></span>中<span class="_ _1"></span><span class="ff1">,67.707kHz<span class="_"> </span></span>的<span class="_ _0"> </span><span class="ff1">TXI/Q<span class="_ _0"> </span></span>信<span class="_ _1"></span>号对<span class="_ _1"></span>发<span class="_ _1"></span>射<span class="_ _1"></span>中频<span class="_ _1"></span>载<span class="_ _1"></span>波<span class="_ _1"></span>进行<span class="_ _1"></span>调</div><div class="t m0 x2 h4 y10 ff2 fs0 fc0 sc0 ls0 ws0">制<span class="ff1">,</span>得到<span class="_ _1"></span>发射已调中频信号<span class="_ _1"></span>。<span class="ff1">TXI/Q<span class="_ _0"> </span></span>调制器通常都是在<span class="_ _1"></span>一个中频处理<span class="_ _1"></span>模块中<span class="ff1">,</span>少<span class="_ _1"></span>数的发射机则</div><div class="t m0 x2 h4 y11 ff2 fs0 fc0 sc0 ls0 ws0">有一个专门的调制器模块。</div></div><div class="t m0 x3 h5 yc ff1 fs1 fc0 sc0 ls0 ws0">2</div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div>