基于smic40nm工艺，SAR ADC ，逐次逼近型 10bit，50MHZ，适合新手入门学习使用，有配套的教程 基于smi
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基于smic40nm工艺，SAR ADC ，逐次逼近型 10bit，50MHZ，适合新手入门学习使用，有配套的教程 基于smic40nm工艺，采样时钟异步，含有冗余设计，电路包括但不限于栅压自举开关 CDAC 比较器 SAR逻辑电路。送工艺库，前仿真，无版图。自己收集的学习有matlab代码，可仿真动态性能指标FFT ENOB SNDR SFDR SNR THD，静态性能指标测试（inl，dnl，thd等），代码注释完整易懂，可快速上手。 <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89737077/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89737077/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">基于<span class="_ _0"> </span><span class="ff2">smic40nm<span class="_ _1"> </span></span>工艺的逐次逼近型<span class="_ _0"> </span><span class="ff2">10bit SAR ADC</span></div><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">摘要<span class="ff3">：</span>本文介绍了基于<span class="_ _0"> </span><span class="ff2">smic40nm<span class="_ _1"> </span></span>工艺的逐次逼近型<span class="_ _0"> </span><span class="ff2">10bit SAR ADC<span class="ff4">。</span></span>该<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>适合新手入门学习</div><div class="t m0 x1 h2 y3 ff1 fs0 fc0 sc0 ls0 ws0">使用<span class="ff3">，</span>具有<span class="_ _0"> </span><span class="ff2">50MHz<span class="_ _1"> </span></span>采样速率<span class="ff4">。</span>文章将着重介绍<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>的各个模块<span class="ff3">，</span>如栅压自举开关<span class="ff4">、<span class="ff2">CDAC</span>、</span>比较器和</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">SAR<span class="_ _1"> </span><span class="ff1">逻辑电路<span class="ff3">，</span>并提供了配套的教程和参考资料<span class="ff3">，</span>包括学习资源<span class="ff4">、</span>仿真代码和文献<span class="ff4">。</span></span></div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff1">引言</span></div><div class="t m0 x1 h2 y6 ff1 fs0 fc0 sc0 ls0 ws0">逐次逼近型<span class="ff2">(Successive Approximation Register, SAR) ADC<span class="_ _1"> </span></span>是一种常用的模数转换器<span class="ff3">，</span></div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0">具有较高的分辨率和较低的功耗<span class="ff4">。</span>在本文中<span class="ff3">，</span>我们介绍了基于<span class="_ _0"> </span><span class="ff2">smic40nm<span class="_ _1"> </span></span>工艺的逐次逼近型<span class="_ _0"> </span><span class="ff2">10bit </span></div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls0 ws0">SAR ADC<span class="_ _1"> </span><span class="ff1">的设计和实现<span class="ff4">。</span></span></div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff1">设计原理</span></div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">2.1.<span class="_"> </span>SMIC40nm<span class="_ _1"> </span><span class="ff1">工艺</span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">SMIC40nm<span class="_ _1"> </span><span class="ff1">工艺是上海微电子有限公司<span class="ff3">（</span></span>SMIC<span class="ff3">）<span class="ff1">生产的一种先进<span class="_ _0"> </span></span></span>CMOS<span class="_ _1"> </span><span class="ff1">工艺<span class="ff4">。</span>它具有较小的晶体管尺</span></div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">寸和低功耗特性<span class="ff3">，</span>适合用于集成电路的设计<span class="ff4">。</span></div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">2.2.<span class="_"> </span><span class="ff1">逐次逼近型<span class="_ _0"> </span></span>ADC<span class="_ _1"> </span><span class="ff1">原理</span></div><div class="t m0 x1 h2 ye ff1 fs0 fc0 sc0 ls0 ws0">逐次逼近型<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>通过逐位逼近的方式进行模数转换<span class="ff4">。</span>它包括一个<span class="_ _0"> </span><span class="ff2">SAR<span class="_ _1"> </span></span>逻辑电路<span class="ff4">、</span>一个比较器<span class="ff4">、</span>一个</div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">栅压自举开关和一个电流数模转换器<span class="ff2">(CDAC)<span class="ff4">。</span></span>在每个时钟周期中<span class="ff3">，<span class="ff2">SAR<span class="_ _1"> </span></span></span>逻辑电路通过比较器的输出</div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">和预设的数字量来决定每一位的比特值<span class="ff4">。</span></div><div class="t m0 x1 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">3.<span class="_ _2"> </span>ADC<span class="_ _1"> </span><span class="ff1">模块设计</span></div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">3.1.<span class="_"> </span><span class="ff1">栅压自举开关</span></div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">栅压自举开关在<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>中起到重要的作用<span class="ff3">，</span>它用于控制输入信号和比较器之间的连接<span class="ff4">。</span>在本设计中<span class="ff3">，</span>我</div><div class="t m0 x1 h2 y14 ff1 fs0 fc0 sc0 ls0 ws0">们采用了一种特殊的自举开关设计<span class="ff3">，</span>以提高输入信号的线性度和减少开关电容对性能的影响<span class="ff4">。</span></div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">3.2.<span class="_"> </span>CDAC<span class="_ _1"> </span><span class="ff1">设计</span></div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">CDAC<span class="_ _1"> </span><span class="ff1">是逐次逼近型<span class="_ _0"> </span></span>ADC<span class="_ _1"> </span><span class="ff1">中的核心模块之一<span class="ff3">，</span>它用于将数字量转换为相应的模拟电流<span class="ff4">。</span>在本设计中<span class="ff3">，</span></span></div><div class="t m0 x1 h2 y17 ff1 fs0 fc0 sc0 ls0 ws0">我们采用了一种异步采样时钟的设计<span class="ff3">，</span>以减少时钟抖动对<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>性能的影响<span class="ff3">，</span>并采用冗余设计来提高线</div><div class="t m0 x1 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0">性度和减小误差<span class="ff4">。</span></div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls0 ws0">3.3.<span class="_"> </span><span class="ff1">比较器设计</span></div><div class="t m0 x1 h2 y1a ff1 fs0 fc0 sc0 ls0 ws0">比较器是逐次逼近型<span class="_ _0"> </span><span class="ff2">ADC<span class="_ _1"> </span></span>中的关键模块<span class="ff3">，</span>它用于比较输入信号和参考电压<span class="ff3">，</span>以确定每一位的比特值<span class="ff4">。</span></div><div class="t m0 x1 h2 y1b ff1 fs0 fc0 sc0 ls0 ws0">在本设计中<span class="ff3">，</span>我们采用了一种高速<span class="ff4">、</span>低功耗的比较器设计<span class="ff3">，</span>以满足高速采样的要求<span class="ff4">。</span></div><div class="t m0 x1 h2 y1c ff2 fs0 fc0 sc0 ls0 ws0">3.4.<span class="_"> </span>SAR<span class="_ _1"> </span><span class="ff1">逻辑电路设计</span></div><div class="t m0 x1 h2 y1d ff2 fs0 fc0 sc0 ls0 ws0">SAR<span class="_ _1"> </span><span class="ff1">逻辑电路用于控制逐次逼近过程中每一位的比较和决策<span class="ff4">。</span>在本设计中<span class="ff3">，</span>我们采用了一种高效的逻</span></div><div class="t m0 x1 h2 y1e ff1 fs0 fc0 sc0 ls0 ws0">辑电路设计<span class="ff3">，</span>以减少功耗并提高转换速度<span class="ff4">。</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>