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一种低噪声可变增益放大器。文中介绍了以AD603 为核心构成的低噪声可变增益放大器的实用电路, 通过模式选择、
引脚编程, 可选择不同的带宽, 以及得到不同的增益。通过对增益控制方式的选择, 可得到最佳的信
噪比。-A low noise variable gain amplifier. In this paper, in order to AD603 as the core consisting of low-noise variable gain amplifier circuit of the practical, through mode selection, lead programming, choice of different bandwidth, as well as different gain. Way to gain control through the choice of the best available signal to noise ratio.