脑电信号放大器的原理
时间: 2023-08-15 20:14:52 浏览: 211
脑电信号放大器的原理是通过差分放大器来放大微弱的脑电信号。差分放大器是脑电图仪器的前置放大器,它通过多级连续的电压放大,将微弱的脑电信号放大数百万倍。前置放大器有两个输入端,分别为输入1(栅极1)和输入2(栅极2)。差分放大器具有抑制同相共模信号而放大异相差模信号的功能,前者为共模抑制比,后者称为差分放大。这样可以有效地放大脑电信号,并抑制其他干扰信号,提高信号的质量和可靠性。\[1\]
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