20春学期《模拟电子技术基础Ⅰ》在线平时作业2

adminhan

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: ZH-CN; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">对甲乙类功率放大器，其静态工作点一般设置在特性曲线的（ &nbsp;）</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: ZH-CN; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">放大区中部</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: ZH-CN; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">截止区</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: ZH-CN; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">放大区但接近截止区</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: ZH-CN; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">放大区但接近饱和区</span>

<div>功率放大电路的最大输出功率是在输入电压为正弦波时，输出基本不失真情况下负载上获得的最大（ ）。</div>
A:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>交流功率</span>
B:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>直流功率</span>
C:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>平均功率</span>
D:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>有功功率</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">在本征半导体中加入（</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US"> </span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">）元素可以形成</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US">N</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">型半导体。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">五价</span>
B:四价
C:三价
D:二价

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">差分放大电路的差模信号是两个输入端信号的差，共模信号是两个输入端信号的（<span lang="EN-US"> </span>）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">差</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">和</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">平均值</span>

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">欲将正弦波电压移相＋</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US">90^O</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">，应选用</span>
A:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">反相比例运算电路</span>
B:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">同相比例运算电路</span>
C:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">积分运算电路</span>
D:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">微分运算电路</span>

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">欲得到电流－电压转换电路，应在放大电路中引入</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: black; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US">( )</span>
A:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电压串联负反馈</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: black; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"> </span>
B:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电压并联负反馈</span>
C:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电流串联负反馈</span>
D:<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电流并联负反馈</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">通用型集成运放的输入级多采用<span lang="EN-US">( )</span>，中间级多采用共射放大电路，输出级多采用<span lang="EN-US">OCL</span>电路。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">共射放大电路</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">差分放大电路</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">OCL</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电路</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">OTL</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电路</span>

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt">在单相桥式整流电路中，若有一只整流管接反，则</span>
A:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt">输出电压约为</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Calibri','sans-serif'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体; mso-bidi-font-size: 11.0pt">2<em>U</em>_D</span>
B:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt">变为半波直流</span>
C:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt">整流管将因电流过大而烧坏</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">在由运放组成的电路中，运放工作在非线性状态的电路是（ ）</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">反相放大器</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">差值放大器</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">有源滤波器</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt">电压比较器</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">选用差分放大电路的原因是（<span lang="EN-US"> </span>）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">克服温漂</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">提高输入电阻</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">稳定放入倍数</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">集成运放有<span lang="EN-US">2</span>个输入端和（<span lang="EN-US">&nbsp; </span>）个输出端</span>
A:1
B:2
C:3
D:4

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">某放大电路在负载开路时的输出电压为<span lang="EN-US">4V</span>，接入<span lang="EN-US">12K</span>&Omega;的负载电阻后，输出电压降为<span lang="EN-US">3V</span>，这说明放大电路的输出电阻为（<span lang="EN-US"> </span>）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">10K</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&Omega;</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">4K</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&Omega;</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">3K</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&Omega;</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">2K</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&Omega;</span>

<p><img width="579" height="50" alt="" src="http://file.open.com.cn/ItemDB/98837/57ffd30a-c07c-489e-aec5-416ebf310004/201182916720710.png" />&nbsp;</p>
A:70
B:83
C:90
D:100

<span style='color: black; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: "Times New Roman";'>为增大电压放大倍数，集成运放的中间级多采用（</span><span lang="EN-US" style='color: black; font-family: "Calibri","sans-serif"; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman"; mso-fareast-font-family: 宋体;'> </span><span style='color: black; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: "Times New Roman";'>）。</span>
A:<span style='color: black; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: "Times New Roman";'>共射放大电路</span>
B:<span style='color: black; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: "Times New Roman";'>共集放大电路</span>
C:<span style='color: black; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: "Times New Roman";'>共基放大电路</span>

<div>功率放大电路的最大输出功率是在输入电压为正弦波时，输出基本不失真情况下负载上获得的最大（ ）。</div>
A:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>交流功率</span>
B:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>直流功率</span>
C:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>平均功率</span>
D:<span style='font-family: 宋体; font-size: 12pt; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-size: 11.0pt;'>有功功率</span>

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">在运算电路中，集成运放的反相输入端均为虚地。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电路只要满足</span><span style="POSITION: relative; FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; TOP: 4pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: 宋体; mso-text-raise: -4.0pt" lang="EN-US"><img width="62" height="26" alt="" src="http://file.open.com.cn/ItemDB/98837/f96578c5-e632-4d36-af75-e692f7fab0e1/201192521458344.jpg" /></span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">，就一定会产生正弦波振荡。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: 'Times New Roman'">在输入信号作用时，偏置电路改变了各放大管的动态电流。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">负反馈放大电路不可能产生自激振荡。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">放大电路必须加上合适的直流电源才能正常工作。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">射极输出器的电压增益小于<span lang="EN-US">1</span>，因此不宜用来放大信号。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">在</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US">N</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">型半导体中如果掺入足够量的三价元素，可将其改型为</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体" lang="EN-US">P</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">型半导体。</span>
A:错误
B:正确

<p>&nbsp;<img width="501" height="23" alt="" src="http://file.open.com.cn/ItemDB/98837/02439374-9329-4771-92a6-31d5cbf767d8/201182911619401.png" /></p>
A:错误
B:正确

<span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当输入电压</span><em><span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">U</span></em>_{<span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 'Times New Roman','serif'; POSITION: relative; TOP: 2pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体; mso-text-raise: -2.0pt">I</span>}<span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">和负载电流</span><em><span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">I</span></em>_{<span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 'Times New Roman','serif'; POSITION: relative; TOP: 2pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体; mso-text-raise: -2.0pt">L</span>}<span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">变化时，稳压电路的输出电压是绝对不变的。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">阻容耦合放大电路的耦合电容、旁路电容越多，引入负反馈后，越容易产生低频振荡。</span>
A:错误
B:正确