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	<title>模拟与数字电路 &#8211; 学术创新中心</title>
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	<title>模拟与数字电路 &#8211; 学术创新中心</title>
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	<item>
		<title>H21218D-超星练习</title>
		<link>https://www.leexinghai.com/aic/h21218d-%e8%b6%85%e6%98%9f%e7%bb%83%e4%b9%a0/</link>
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		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Sun, 18 Dec 2022 02:30:16 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1656</guid>

					<description><![CDATA[三道题，最近比较忙，参考了其他同学的解法，数据不一定准确。]]></description>
										<content:encoded><![CDATA[
<p>三道题，最近比较忙，参考了其他同学的解法，数据不一定准确。</p>


<div class="wp-block-image">
<figure class="aligncenter size-large"><img fetchpriority="high" decoding="async" width="724" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-724x1024.jpg" alt="" class="wp-image-1657" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-724x1024.jpg 724w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-212x300.jpg 212w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-768x1086.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-1086x1536.jpg 1086w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1-1448x2048.jpg 1448w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_1.jpg 1654w" sizes="(max-width: 724px) 100vw, 724px" /><figcaption class="wp-element-caption">第1题-题目与解答</figcaption></figure>
</div>

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<figure class="aligncenter size-large"><img decoding="async" width="724" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2-724x1024.jpg" alt="" class="wp-image-1658" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2-724x1024.jpg 724w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2-212x300.jpg 212w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2-768x1086.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2-1086x1536.jpg 1086w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/练习3_页面_2.jpg 1100w" sizes="(max-width: 724px) 100vw, 724px" /><figcaption class="wp-element-caption">第2题-题目与解答</figcaption></figure>
</div>

<div class="wp-block-image">
<figure class="aligncenter size-full"><img decoding="async" width="736" height="761" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/image-23.png" alt="" class="wp-image-1661" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/image-23.png 736w, https://www.leexinghai.com/aic/wp-content/uploads/2022/12/image-23-290x300.png 290w" sizes="(max-width: 736px) 100vw, 736px" /><figcaption class="wp-element-caption">第3题-题目与解答</figcaption></figure>
</div>]]></content:encoded>
					
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		<item>
		<title>K21017-实验报告册</title>
		<link>https://www.leexinghai.com/aic/k21017-%e5%ae%9e%e9%aa%8c%e6%8a%a5%e5%91%8a%e5%86%8c/</link>
					<comments>https://www.leexinghai.com/aic/k21017-%e5%ae%9e%e9%aa%8c%e6%8a%a5%e5%91%8a%e5%86%8c/#respond</comments>
		
		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Sat, 17 Dec 2022 03:34:24 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1651</guid>

					<description><![CDATA[没什么好说的，就是模拟与数字电路这门课整理为一套的实验报告册，数据不一定准确，特别是实验6-实验9，是参考了其 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>没什么好说的，就是模拟与数字电路这门课整理为一套的实验报告册，数据不一定准确，<strong>特别是实验6-实验9，是参考了其他同学的数值（疫情在家做不了实验）</strong>仅供参考。</p>



<p class="has-medium-font-size">还有，复制数据可以，<strong>不要把实验7和实验9的图也一起偷了，那是我自己画的</strong>。<mark style="background-color:rgba(0, 0, 0, 0)" class="has-inline-color has-vivid-green-cyan-color">画那几幅图，10分钟都不需要。</mark>如果我发现有人直接把我自己画的图也复制过去了，自己看着办。</p>



<div data-wp-interactive="core/file" class="wp-block-file"><object data-wp-bind--hidden="!state.hasPdfPreview" hidden class="wp-block-file__embed" data="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/放网上的.pdf" type="application/pdf" style="width:100%;height:600px" aria-label="嵌入 模拟与数字电路实验报告册"></object><a id="wp-block-file--media-ed32a80b-b599-46c8-8172-bb35a3e4c868" href="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/放网上的.pdf">模拟与数字电路实验报告册</a><a href="https://www.leexinghai.com/aic/wp-content/uploads/2022/12/放网上的.pdf" class="wp-block-file__button wp-element-button" download aria-describedby="wp-block-file--media-ed32a80b-b599-46c8-8172-bb35a3e4c868">下载</a></div>
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		<title>H21120D-143页6.8教师答案解析</title>
		<link>https://www.leexinghai.com/aic/h21120d-143%e9%a1%b56-8%e6%95%99%e5%b8%88%e7%ad%94%e6%a1%88%e8%a7%a3%e6%9e%90/</link>
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		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Tue, 22 Nov 2022 01:28:01 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1511</guid>

					<description><![CDATA[网课摆烂了，直接看老师的解析答案吧。]]></description>
										<content:encoded><![CDATA[
<p>网课摆烂了，直接看老师的解析答案吧。</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="733" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/答案-1024x733.png" alt="" class="wp-image-1512" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/答案-1024x733.png 1024w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/答案-300x215.png 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/答案-768x550.png 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/答案.png 1110w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>
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		<item>
		<title>H21114-课后练习1-进制与码制</title>
		<link>https://www.leexinghai.com/aic/h21114-%e8%af%be%e5%90%8e%e7%bb%83%e4%b9%a01-%e8%bf%9b%e5%88%b6%e4%b8%8e%e7%a0%81%e5%88%b6/</link>
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		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Tue, 15 Nov 2022 08:40:21 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1448</guid>

					<description><![CDATA[6.1：将下列各数转换成二进制数 1.【(28)10】2.【(7026)8】3.【(15A)16】 第1题解答 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>6.1：将下列各数转换成二进制数</p>



<p>1.【(28)10】2.【(7026)8】3.【(15A)16】</p>



<p>第1题解答：11100</p>



<p>第2题解答：111000010110</p>



<p>第3题解答：101011010</p>



<p>6.2：将下列二进制数转换成十进制、八进制和十六进制数</p>



<p>1.10110101   2.10101.11 3.11010110</p>



<p>第1题解答：十进制：181   八进制：265   十六进制：B5</p>



<p>第2题解答：十进制：21.3  八进制：25.6   十六进制：15.C</p>



<p>第3题解答：十进制：214   八进制：326   十六进制：D6</p>
]]></content:encoded>
					
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		<title>H21109-实验5-集成运算放大器的研究(第1部分)</title>
		<link>https://www.leexinghai.com/aic/h21109-%e5%ae%9e%e9%aa%8c5-%e9%9b%86%e6%88%90%e8%bf%90%e7%ae%97%e6%94%be%e5%a4%a7%e5%99%a8%e7%9a%84%e7%a0%94%e7%a9%b6%e7%ac%ac1%e9%83%a8%e5%88%86/</link>
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		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Thu, 10 Nov 2022 01:11:09 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1416</guid>

					<description><![CDATA[一、实验目的 （1）研究由集成运算放大器组成的比例、加法、减法和积分等基本运算电路的功能。 （2）了解运算放大 [&#8230;]]]></description>
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<p><strong>一、实验目的</strong></p>



<p>（1）研究由集成运算放大器组成的比例、加法、减法和积分等基本运算电路的功能。</p>



<p>（2）了解运算放大器在实际应用时应考虑的一些问题。</p>



<p><strong>二、实验仪器设备及软件</strong></p>



<p>⑴±12V直流电源；</p>



<p>⑵函数信号发生器；</p>



<p>⑶交流毫伏表；</p>



<p> ⑷直流电压表；                             </p>



<p>⑸集成运算放大器μA741×1片 ；</p>



<p>⑹电阻器、电容器若干。</p>



<p>实验前要看清运放组件各引脚的位置，切忌正、负电源极性接反和输出端短路，否则将会损坏集成块。</p>



<p><strong>三、实验原理</strong></p>



<p>集成运算放大器是一种具有高电压放大倍数的直接耦合多级放大电路。当外部接入不同的线性或非线性元器件组成输入和负反馈电路时，可以灵活地实现各种特定的函数关系。在线性应用方面，可组成比例、加法、减法、积分、微分和对数等模拟运算电路。</p>



<p><strong>1.</strong><strong>理想运算放大器特性</strong></p>



<p>在大多数情况下，将运放视为理想运放，就是将运放的各项技术指标理想化。满足下列条件的运算放大器称为理想运放：</p>



<p>开环电压增益&nbsp;&nbsp; A<sub>Vd</sub>＝∞；</p>



<p>输入阻抗&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>i</sub>＝∞；</p>



<p>输出阻抗&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; R<sub>o</sub>＝0；</p>



<p>带宽&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <em>f</em><sub>BW</sub>＝∞；</p>



<p>失调与漂移均为零等。</p>



<p>理想运放在线性应用时的两个重要特性：</p>



<p>（1）输出电压U<sub>o</sub>与输入电压之间满足关系式<img loading="lazy" decoding="async" width="150" height="23" class="wp-image-1417" style="width: 150px;" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-73.png" alt=""></p>



<p>由于A<sub>Vd</sub>＝∞，而U<sub>o </sub>为有限值，因此，<img loading="lazy" decoding="async" width="71" height="30" class="wp-image-1418" style="width: 71px;" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-74.png" alt="">≈0V。即U+≈U-，称为“虚短”。</p>



<p>（2）由于R<sub>i</sub>＝∞，故流进运放两个输入端的电流可视为零，即I<sub>iB </sub>=0，称为“虚断”。这说明运放对其前级吸取电流极小。</p>



<p>上述两个特性是分析理想运放应用电路是基本原则，可简化运放电路的计算。</p>



<p><strong>2</strong><strong>．基本运算电路</strong><strong></strong></p>



<p>（1）反相比例运算电路</p>



<p>电路如图7-1所示。对于理想运放，该电路的输出电压与输入电压之间的关系为<img loading="lazy" decoding="async" width="116" height="51" class="wp-image-1419" style="width: 116px;" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-75.png" alt=""></p>



<p>为了减少输入级偏置电流引起的运算误差，在同相输入端应接入平衡电阻R2=R1//Rf。</p>



<p>（2）反相加法电路</p>



<p>反相加法电路如图7-2所示，输出电压与输入电压之间的关系为<img loading="lazy" decoding="async" width="150" height="39" class="wp-image-1420" style="width: 150px;" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-76.png" alt=""></p>



<p> R<sub>3</sub>=R<sub>1</sub>//R<sub>2</sub>//R<sub>f</sub></p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="734" height="341" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-77.png" alt="" class="wp-image-1421" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-77.png 734w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-77-300x139.png 300w" sizes="auto, (max-width: 734px) 100vw, 734px" /></figure>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="770" height="701" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-78.png" alt="" class="wp-image-1422" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-78.png 770w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-78-300x273.png 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-78-768x699.png 768w" sizes="auto, (max-width: 770px) 100vw, 770px" /></figure>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="766" height="491" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-79.png" alt="" class="wp-image-1423" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-79.png 766w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-79-300x192.png 300w" sizes="auto, (max-width: 766px) 100vw, 766px" /></figure>



<p>即输出电压<em>u</em><sub>o </sub>(t)随时间增长而线性下降。显然RC的数值最大，达到给定的<em>u</em><sub>o</sub>值所需的时间就越长。积分输出电压<em>u</em><sub>o</sub>所能达到的最大值受集成运放最大输出范围的限制。</p>



<p>在进行积分运算之前，首先应对运放调零。为了便于调节，将图中K<sub>1</sub>闭合，即通过电阻R<sub>2</sub>的负反馈的作用帮助实现调零。但在完成调零后，应将K<sub>1</sub>打开，以免因R<sub>2</sub>的接入造成积分误差。K<sub>2 </sub>的设置一方面为积分电容放电提供通路，同时可实现积分电容初始电压<img loading="lazy" decoding="async" width="40" height="24" src="">=0V；另一方面，可控制积分起始点，即在加入信号<em>u</em><sub>i </sub>后，只要K<sub>2 </sub>一打开，电容就将被恒流源充电，电路也就开始进行积分运算。</p>



<p><strong>四、实验内容与步骤</strong></p>



<p>本实验采用的集成运放型号是μA741（F007），引脚排列如图7-6所示，它是8脚双列直插式组件，其②脚和③脚为相反和同相输入端，⑥脚为输出端，⑦脚和④脚为正、负电源端，①脚和⑤脚为失调调零端，①脚和⑤脚之间可接入一只几十kΩ的电位器并将滑动出头接到负电源端，⑧脚为空脚。</p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="398" height="334" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-80.png" alt="" class="wp-image-1424" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-80.png 398w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-80-300x252.png 300w" sizes="auto, (max-width: 398px) 100vw, 398px" /></figure>
</div>


<p><strong>1.</strong><strong>反相比例运算电路</strong><strong></strong></p>



<p>（1）按图7-1连接实验电路，接通±12V电源，输入端<em>u</em><sub>i </sub>对地短路，即进行调零和消振，。</p>



<p>（2）输入频率<em>f</em>＝100Hz，<em>u</em><sub>i </sub>=0.5V的正弦交流信号，测量相应的<em>u</em><sub>o </sub>，并用示波器观察<em>u</em><sub>o </sub>和<em>u</em><sub>i </sub>的相位关系，并记入表7-1中。</p>



<p>表7-1</p>



<figure class="wp-block-image size-full is-resized"><img loading="lazy" decoding="async" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-81.png" alt="" class="wp-image-1425" width="708" height="134" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-81.png 708w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-81-300x57.png 300w" sizes="auto, (max-width: 708px) 100vw, 708px" /></figure>



<p>参考实验记录图：</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="768" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21-1024x768.jpg" alt="" class="wp-image-1426" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21-1024x768.jpg 1024w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21-300x225.jpg 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21-768x576.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21-1536x1152.jpg 1536w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/77d0cdbd4b6645c105a82f020900a21.jpg 1706w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>
]]></content:encoded>
					
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		<title>H21102-实验4-正弦波振荡电路研究(第2部分)</title>
		<link>https://www.leexinghai.com/aic/h21102-%e5%ae%9e%e9%aa%8c4-%e6%ad%a3%e5%bc%a6%e6%b3%a2%e6%8c%af%e8%8d%a1%e7%94%b5%e8%b7%af%e7%a0%94%e7%a9%b6%e7%ac%ac2%e9%83%a8%e5%88%86/</link>
					<comments>https://www.leexinghai.com/aic/h21102-%e5%ae%9e%e9%aa%8c4-%e6%ad%a3%e5%bc%a6%e6%b3%a2%e6%8c%af%e8%8d%a1%e7%94%b5%e8%b7%af%e7%a0%94%e7%a9%b6%e7%ac%ac2%e9%83%a8%e5%88%86/#respond</comments>
		
		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Wed, 02 Nov 2022 06:57:13 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1312</guid>

					<description><![CDATA[&#160;&#160; 一、实验目的 （1）进一步学习RC、LC正弦波振荡器的组成及其振荡条件。 （2）学会 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>&nbsp;&nbsp; <strong>一、实验目的</strong></p>



<p>（1）进一步学习RC、LC正弦波振荡器的组成及其振荡条件。</p>



<p>（2）学会测量调试振荡器。<strong></strong></p>



<p><strong>二、实验仪器设备及软件</strong></p>



<p>示波器、信号源、实验箱、万用表</p>



<p><strong>三、实验参考图示</strong></p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="566" height="768" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-36.png" alt="" class="wp-image-1344" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-36.png 566w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-36-221x300.png 221w" sizes="auto, (max-width: 566px) 100vw, 566px" /><figcaption class="wp-element-caption">图3-1静态工作点位端口标识</figcaption></figure>
</div>

<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="579" height="375" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-37.png" alt="" class="wp-image-1345" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-37.png 579w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-37-300x194.png 300w" sizes="auto, (max-width: 579px) 100vw, 579px" /><figcaption class="wp-element-caption">图3-2 测试U0电压</figcaption></figure>
</div>

<div class="wp-block-image">
<figure class="aligncenter size-full is-resized"><img loading="lazy" decoding="async" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-38.png" alt="" class="wp-image-1346" width="580" height="472" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-38.png 580w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-38-300x244.png 300w" sizes="auto, (max-width: 580px) 100vw, 580px" /><figcaption class="wp-element-caption">图3-3参考接线图</figcaption></figure>
</div>


<p><strong>四.实验内容及步骤</strong></p>



<p>1.LC正弦振荡器研究（图4-5示为变压器耦合正反馈LC振荡器电路）</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="339" height="289" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-32.png" alt="" class="wp-image-1336" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-32.png 339w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-32-300x256.png 300w" sizes="auto, (max-width: 339px) 100vw, 339px" /></figure>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="120" height="52" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-33.png" alt="" class="wp-image-1337"/></figure>



<p>（1）按图4-5连接实验电路。电位器R<sub>w</sub>置最大位置，振荡电路的输出端接入示波器。</p>



<p>（2）接通U<sub>CC</sub>=+12V电源，调节电位器R<sub>w</sub>，使输出端得到不失真的正弦波形，如不起振，可改变L<sub>2</sub>的首末端位置，使之起振。</p>



<p>（3）测量两管的静态工作点及正弦波的有效值U<sub>O</sub>,并计入表5-1中。</p>



<p>（4）把R<sub>w</sub>值调小，观察输出波形的变化。测量有关数据，并记于表5-1中。</p>



<p>（5）调大R<sub>w</sub>值，使振荡波形刚刚消失，测量有关数据，计入表5-1中。</p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="800" height="401" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-34.png" alt="" class="wp-image-1339" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-34.png 800w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-34-300x150.png 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-34-768x385.png 768w" sizes="auto, (max-width: 800px) 100vw, 800px" /><figcaption class="wp-element-caption">注：1.实验数据仅供参考；2.波形中的”格“为示波器中显示的格数</figcaption></figure>
</div>


<p> 根据以上三组数据，分析静态工作点对电路起振、输出波形幅度和失真的影响。<br>（6）观察反馈量大小对输出波形的影响<br>置反馈线圈L<sub>2</sub>于位置“0”（无反馈）、“1”（反馈量不足）、“2”（反馈量合适）、“3”（反馈量过强）时测量相应的输出电压波形，记于表5-2中。</p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="888" height="291" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-35.png" alt="" class="wp-image-1340" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-35.png 888w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-35-300x98.png 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/11/image-35-768x252.png 768w" sizes="auto, (max-width: 888px) 100vw, 888px" /><figcaption class="wp-element-caption">注：波形中的”格“为示波器中显示的格数</figcaption></figure>
</div>


<p><strong>五．实验结果及分析</strong></p>



<p>（1）电路参数对LC振荡器起振条件及输出波形的影响：</p>



<p>仅供参考：</p>



<p>调整滑动变阻器的阻值时，可改变静态工作点电压。当滑动变阻器处于最小或最大阻值时，U0的值是相同的。</p>



<p>改变变压器的点位，可以改变U0的波形：处于”0“位时，示波器显示为一条直线。处于”1“位时，示波器显示为高度1格的正弦波。处于”2“或”3“位时，示波器显示为高度2格的正弦波。</p>



<p>（2） 讨论你在实验中发现的问题及你的解决办法：</p>



<p>没有问题。</p>
]]></content:encoded>
					
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			</item>
		<item>
		<title>H21026-实验4-正弦波振荡电路研究(第1部分)</title>
		<link>https://www.leexinghai.com/aic/h21026-%e5%ae%9e%e9%aa%8c4-%e6%ad%a3%e5%bc%a6%e6%b3%a2%e6%8c%af%e8%8d%a1%e7%94%b5%e8%b7%af%e7%a0%94%e7%a9%b6%e7%ac%ac1%e9%83%a8%e5%88%86/</link>
					<comments>https://www.leexinghai.com/aic/h21026-%e5%ae%9e%e9%aa%8c4-%e6%ad%a3%e5%bc%a6%e6%b3%a2%e6%8c%af%e8%8d%a1%e7%94%b5%e8%b7%af%e7%a0%94%e7%a9%b6%e7%ac%ac1%e9%83%a8%e5%88%86/#respond</comments>
		
		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Wed, 26 Oct 2022 03:00:40 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1178</guid>

					<description><![CDATA[说明：RC振荡器和LC振荡器任选一个完成即可 &#160;&#160; 一、实验目的 （1）进一步学习RC、L [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>说明：RC振荡器和LC振荡器任选一个完成即可</p>



<p>&nbsp;&nbsp; <strong>一、实验目的</strong></p>



<p>（1）进一步学习RC、LC正弦波振荡器的组成及其振荡条件。</p>



<p>（2）学会测量调试振荡器。<strong></strong></p>



<p><strong>二、实验仪器设备及软件</strong></p>



<p>示波器、信号源、实验箱、万用表</p>



<p><strong>三、实验原理</strong></p>



<p>1.RC移相振荡器</p>



<p>选择R>>R<sub>i</sub>。振荡频率  </p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="99" height="45" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-111.png" alt="" class="wp-image-1219"/></figure>



<p>起振条件  放大器A的电压放大倍数|A*|＞29</p>



<p>电路特点&nbsp; 简便，但选频作用差，振幅不稳，频率调节不便；一般用于频率固定且稳定性要求不高的场合。频率范围&nbsp; 几赫兹~数十千赫兹</p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="281" height="132" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-108.png" alt="" class="wp-image-1215"/><figcaption>图4－1  RC移相振荡器原理图</figcaption></figure>
</div>


<p></p>



<p>2．RC串并联网络（文氏桥）振荡器</p>



<p> 振荡频率：</p>



<figure class="wp-block-image size-full wp-duotone-000000-000000-1"><img loading="lazy" decoding="async" width="111" height="64" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-114.png" alt="" class="wp-image-1223"/></figure>



<p>     起振条件：   |A*|＞3</p>



<p>电路特点：可连续改变振荡频率，便于加负反馈稳幅，容易得到良好的振荡波形。</p>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="281" height="132" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-112.png" alt="" class="wp-image-1221"/><figcaption>图4－2  RC串并联网络振荡器原理图</figcaption></figure>
</div>


<p></p>



<p><strong>四.实验内容及步骤</strong></p>



<p>1、 RC串并联选频网络振荡器</p>



<p>（1）按图4－4组接线路</p>



<p>&nbsp;(2) 断开RC串并联网络，测量放大器静态工作点。</p>



<p>&nbsp;(3) 接通RC串并联网络，并使电路起振，用示波器观测输出电压u<sub>O</sub>波形，调节R<sub>f</sub>使获得满意的正弦信号，记录波形及其参数。</p>



<p>(4) 测量振荡频率，并与计算值进行比较。</p>



<p>(5) 改变R或C值，观察振荡频率变化情况。</p>



<p>(6) RC串并联网络幅频特性的观察</p>



<p>将RC串并联网络与放大器断开，用函数信号发生器的正弦信号注入RC串并联网络，保持输入信号的幅度不变（约3V），频率由低到高变化，RC串并联网络输出幅值将随之变化，当信号源达某一频率时，RC串并联网络的输出将达最大值（约1V左右）。且输入、输出同相位，此时信号源频率为</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="155" height="64" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-107.png" alt="" class="wp-image-1214"/></figure>


<div class="wp-block-image">
<figure class="aligncenter size-full"><img loading="lazy" decoding="async" width="411" height="214" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-106.png" alt="" class="wp-image-1213" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-106.png 411w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-106-300x156.png 300w" sizes="auto, (max-width: 411px) 100vw, 411px" /><figcaption>图4-4  RC串并联选频网络振荡器</figcaption></figure>
</div>


<p>（7）测量负反馈放大电路的放大倍数A<sub>Vf</sub>及反馈系数F：调节10kΩ电位器使电路振荡并维持稳定振荡时，记下此时的幅值uo，然后断开A、B连线，在B端加入和振荡频率一致的信号电压，使输出波形的幅值与原振荡时的幅值相同。测量B点对地电位和1.2kΩ电阻上的压降，最后断开电源及信号源，用万用电表测量10kΩ电位器此时的电阻值，并将测量结果记入表4-1中（<strong><mark style="background-color:rgba(0, 0, 0, 0)" class="has-inline-color has-vivid-red-color">数据仅供参考</mark></strong>）。</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="806" height="246" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-113.png" alt="" class="wp-image-1222" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-113.png 806w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-113-300x92.png 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-113-768x234.png 768w" sizes="auto, (max-width: 806px) 100vw, 806px" /></figure>



<p>参考过程1（测量u0电压）：</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="768" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-1024x768.jpg" alt="" class="wp-image-1224" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-1024x768.jpg 1024w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-300x225.jpg 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-768x576.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-1536x1152.jpg 1536w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/fa16d649a5cd8d6724bbd0b1b5a2afa-2048x1536.jpg 2048w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>参考过程2（测量Rf+Rw）：</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="768" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-1024x768.jpg" alt="" class="wp-image-1225" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-1024x768.jpg 1024w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-300x225.jpg 300w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-768x576.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-1536x1152.jpg 1536w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/1cd418fa5057fd031bce6832814d4af-2048x1536.jpg 2048w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>参考过程3（示波器波形）：</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="768" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-768x1024.jpg" alt="" class="wp-image-1226" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-768x1024.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-225x300.jpg 225w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-1152x1536.jpg 1152w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-1536x2048.jpg 1536w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/abbf4808ddc6c10da3e2748aa6fff05-scaled.jpg 1920w" sizes="auto, (max-width: 768px) 100vw, 768px" /></figure>
]]></content:encoded>
					
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			</item>
		<item>
		<title>H21019-实验3-射极跟随器研究</title>
		<link>https://www.leexinghai.com/aic/h21019-%e5%ae%9e%e9%aa%8c3-%e5%b0%84%e6%9e%81%e8%b7%9f%e9%9a%8f%e5%99%a8%e7%a0%94%e7%a9%b6/</link>
					<comments>https://www.leexinghai.com/aic/h21019-%e5%ae%9e%e9%aa%8c3-%e5%b0%84%e6%9e%81%e8%b7%9f%e9%9a%8f%e5%99%a8%e7%a0%94%e7%a9%b6/#respond</comments>
		
		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Wed, 19 Oct 2022 15:18:41 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=1080</guid>

					<description><![CDATA[写在前面：本教程需要结合实验完成，实验报告中的数据仅供参考。 小声bb：后面会增加详细的实验步骤教程（拍下实验 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>写在前面：本教程需要结合实验完成，实验报告中的数据仅供参考。</p>



<p>小声bb：后面会增加详细的实验步骤教程（拍下实验过程图片）</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="724" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_1-724x1024.jpg" alt="" class="wp-image-1085" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_1-724x1024.jpg 724w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_1-212x300.jpg 212w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_1-768x1086.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_1.jpg 794w" sizes="auto, (max-width: 724px) 100vw, 724px" /></figure>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="724" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-724x1024.jpg" alt="" class="wp-image-1086" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-724x1024.jpg 724w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-212x300.jpg 212w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-768x1086.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-1086x1536.jpg 1086w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2-1448x2048.jpg 1448w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_2.jpg 1654w" sizes="auto, (max-width: 724px) 100vw, 724px" /></figure>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="724" height="1024" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-724x1024.jpg" alt="" class="wp-image-1084" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-724x1024.jpg 724w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-212x300.jpg 212w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-768x1086.jpg 768w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-1086x1536.jpg 1086w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3-1448x2048.jpg 1448w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/实验三_页面_3.jpg 1654w" sizes="auto, (max-width: 724px) 100vw, 724px" /></figure>
]]></content:encoded>
					
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			</item>
		<item>
		<title>H20914-实验1-电子仪器仪表的使用</title>
		<link>https://www.leexinghai.com/aic/h20914-%e5%ae%9e%e9%aa%8c1-%e7%94%b5%e5%ad%90%e4%bb%aa%e5%99%a8%e4%bb%aa%e8%a1%a8%e7%9a%84%e4%bd%bf%e7%94%a8/</link>
					<comments>https://www.leexinghai.com/aic/h20914-%e5%ae%9e%e9%aa%8c1-%e7%94%b5%e5%ad%90%e4%bb%aa%e5%99%a8%e4%bb%aa%e8%a1%a8%e7%9a%84%e4%bd%bf%e7%94%a8/#respond</comments>
		
		<dc:creator><![CDATA[李星海]]></dc:creator>
		<pubDate>Fri, 07 Oct 2022 03:01:57 +0000</pubDate>
				<category><![CDATA[模拟与数字电路]]></category>
		<guid isPermaLink="false">https://aic.leexinghai.com/?p=957</guid>

					<description><![CDATA[本教程由 陈志锐 李星海 共同完成。 &#160; 一、实验目的 熟悉示波器、函数信号发生器、直流稳压电源及万 [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p><em>本教程由 陈志锐 李星海 共同完成。</em></p>



<p>&nbsp; <strong>一、实验目的</strong></p>



<p>熟悉示波器、函数信号发生器、直流稳压电源及万用表的使用方法。</p>



<p>&nbsp;&nbsp; <strong>二、实验仪器设备及软件</strong></p>



<p>低频信号发生器、直流稳压电源 、双踪示波器、万用表</p>



<p>&nbsp;&nbsp; <strong>三、实验原理</strong></p>



<p>实验中各仪器可按照信号流向，以连线简捷、调节顺手、观察与读数方便等原则进行合理布局，各仪器与被测实验装置之间的布局与连接如图1所示。接线时应注意，为防止外界干扰，各仪器的公共接地端应连接在一起，称“共地”。示波器等接线要使用专用电缆线，直流电源用普通导线。</p>



<ul class="wp-block-list"><li>先熟悉仪表使用规程，然后使用；测量过程中严格遵守仪器使用注意事项。</li></ul>



<p><strong>四、实验内容与步骤</strong></p>



<p>1、万用表的使用&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="597" height="106" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-11.png" alt="" class="wp-image-960" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-11.png 597w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-11-300x53.png 300w" sizes="auto, (max-width: 597px) 100vw, 597px" /><figcaption>表1-1&nbsp;&nbsp; 万用表的使用</figcaption></figure>



<p>2、示波器的使用——用机内校正信号对示波器进行自检</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="612" height="164" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-10.png" alt="" class="wp-image-959" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-10.png 612w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-10-300x80.png 300w" sizes="auto, (max-width: 612px) 100vw, 612px" /><figcaption>表1-2&nbsp; 示波器的使用</figcaption></figure>



<p>3、低频信号发生器的使用：用示波器观察信号源信号并记录。</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="612" height="149" src="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-9.png" alt="" class="wp-image-958" srcset="https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-9.png 612w, https://www.leexinghai.com/aic/wp-content/uploads/2022/10/image-9-300x73.png 300w" sizes="auto, (max-width: 612px) 100vw, 612px" /><figcaption>表1-3&nbsp; 示波器的使用</figcaption></figure>



<p>4、交流毫伏表的使用</p>



<p><strong>五、实验注意事项</strong></p>



<p>(1)&nbsp; 注意用电安全；</p>



<p>(2)&nbsp; 先熟悉仪表使用规程，然后使用；测量过程中严格遵守。</p>



<p><strong>六、实验结果分析（简述你的测量内容、过程和自我评价）</strong></p>



<p>本次实验对万用表的使用和示波器的使用有一个初步的了解。通过对万用表的读数学习，了解到测量电压或电流电阻的正确档位选择，通过实验对直流稳压电源调节的自定义的电压值进行测量，并将测量所获得的结果记录在实验报告中。通过实验对如何正确使用万用表有了初步的认识。</p>



<p>同时，也对示波器进行了了解性实验。通过输出特定的电压值，将测量仪放置正确的地方进行测量，示波器屏幕显示了对应的波形。通过调节Y轴灵敏度和扫描时间量程的参数，可以对示波器在同一条件下的不同显示情况进行了解，为后续的使用打下基础。</p>



<p><strong>七、教师评分</strong></p>
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