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关于多片CD4051的毛刺问题

板子上用多片4051来选通红外LED的接收管,信号幅度就50-100mV,在4051的S0,S1,S2上升沿的时候,会在输出端Z上出现一个尖峰毛刺,再后端放大就不可忽视了。S0S1S2和Z的信号线也都离的挺远的。这现象正常吗?怎么避免?

备注:由于结构需要,每个CD4051之间的距离大概是8cm,第一片4051到最后一片4051的距离大概是1.6米的样子,总共用了20片4051.