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TLV3501电压比较器,输入低频正弦时,输出有较大毛刺

输出如图所示。

高频是没问题(1M-100M).但是输入100Khz以下正弦时,输出会有很多毛刺。输入同频率方波、脉冲则没问题。

PCB如下:

求解如何解决这个问题?

额外说一句:用手触碰330K电阻及其附近时。毛刺明显改善。按理说人手算是一个小电容,在哪加入电容会不会改善呢?