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when testing my power ic, i have found a low frequency noise at clock output (noise at 1hz or lower), but there is no circuit module working at so low frequency. and can it be flicker noise (opamp or comparator)?
i observed clock jitter at very low frequency (1Hz or lower). that is, for every 1s period, there is a change in total clock time (1s+deltaT), and deltaT is random. besides, for my circuit, clock frequency f=1M, clock must be as accurate as possible.