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# 安徽大学 2024—2025 学年第 1 学期集成电路学院《电子线路实验》测试(D) | ||
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## 一、三端集成稳压电源测试。(共 40 分) | ||
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![电子线路考试图](https://cdn.jsdelivr.net/gh/Tonyseth/my_image_bed@main/img/%E7%94%B5%E5%AD%90%E7%BA%BF%E8%B7%AF%E8%80%83%E8%AF%95%E5%9B%BE.png) | ||
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上图为为三端集成稳压电源的电路,交流输入电压为 14V,50Hz,要求完成以下内容: | ||
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1、整流电路:测量并记录整流输出电压大小(直流、交流)、输出波形、电路。(10 分) | ||
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2、滤波电路:测量并记录滤波输出电压大小(直流、交流)、波形、电路。(8 分) | ||
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3、稳压输出电路: | ||
(1) 测量并记录稳压电源输出电压 $$U_O$$ 范围(若 W317 损坏,可改为 78 系列); | ||
(2) $$U_O=5V$$ 时($$R_L=100Ω/2W$$):输出电阻 $$R_O$$、输出电流 $$I_O$$、$$U_O$$ 的纹波电压。(22 分) | ||
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## 二、问答题(共 10 分) | ||
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1、在单管放大电路中,由恒算公式:$$A_v= -\mu \dfrac{R_c}{r_e}$$ 可知,增大 $$R_c$$ 可提高 $$A_v$$。能否无限增大?为什么?在差分电路中如何规避其共模抑制比?(10 分) |
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