| 放大器中非线性失真的研究 |
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| 引用本文： | 王成华,包骅.放大器中非线性失真的研究[J].南京航空航天大学学报(英文版),2000,17(2). |
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| 作者姓名： | 王成华 包骅 |
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| 作者单位： | 南京航空航天大学电子工程系南京,210016 |
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| 摘 要： | 晶体管是非线性器件,在放大信号时会产生非线性失真.针对弱非线性失真,推导了总谐波人(THD)、二阶互调失真(IM2)、三阶互调失真(IM3)和截点(IP3)的表达式,借助于Multisim软件,对晶体管共发放大器、发射极带反馈电阻的失发放大器、差分放大器和发射极间带反馈电阻的差分放大器进行了仿真,并与理论结果作了比较,结果令人满意.
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| 关 键 词： | 非线性失真 互调失真 截点 负反馈 差分对 |
RESEARCH ON NONLINEAR DISTORTION IN AMPLIFIERS |
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| Wang Chenghua,Bao Hua.RESEARCH ON NONLINEAR DISTORTION IN AMPLIFIERS[J].Transactions of Nanjing University of Aeronautics & Astronautics,2000,17(2). |
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| Authors: | Wang Chenghua Bao Hua |
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| Abstract: | Transistors are nonlinear devices, which can produce nonlinear distortion in amplifier while amplifying signals.For weak nonlinear distortion, the expressions of total harmonic distortion (THD), the second-order intermodulation distortion (IM2), the third-order intermodulation distortion(IM3) and intercept point (IP3) are deduced.With the aid of software Multisim, we simulate transistor common-emitter amplifier, transistor common-emitter amplifier with resistor in emitter, differential amplifier and differential amplifier with resistor between emitters. The simulational results and theoretical analyses are almost the same. |
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| Keywords: | nonlinear distortion intermodulation distortion intercept point negative feedback dif ferential amplifier |
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