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小信号放大电路的噪声分析

更新时间:2020-06-04 05:08:31 大小:242K 上传用户:守着阳光1985查看TA发布的资源 标签:小信号放大电路 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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传感器输出电信号很小,易受到外界噪声信号的干扰,为了有效地检测并提取微弱信号,本文采用分立元件设计了一种小信号放大电路,由差分放大电路、两级共射放大电路和推挽输出级等电路组成,不仅满足了电压放大的要求,而且有效地减小了噪声,并在实验的基础上验证了此电路的可行性。由测量结果表明,基于本设计的放大电路可以有效测量微弱信号,减小噪声电压,该电路可广泛应用于弱信号检测中。

The noise can be interfaced easily because of the transducerg small output signal. In order to detect and extract small signal, the amplifying circuit is designed in the paper using unattached components. Differential amplifier, two common emitter circuit and push -pull output circuit are included. This amplifying circuit not only amplifies the voltage, but also reduce the noise effectively. The feasibility of this circuit is discussed by experi- ment. The experiment results show that this amplifying circuit can amplify the small signal and has lower noise. It used widely in weak signal detection

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小信号放大电路的噪声分析.pdf 242K

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