A high-range switched-capacitor (SC) filter capable of tracking sinusoid signals without the need of a reference is presented. The filter tracks sinusoids by adapting the sampling clock of the switched-capacitors. An important feature of this filter is its ability to track sinusoid signals in cases where the frequency of the signal and the center frequency of the filter are off by several octaves. This is particularly useful in applications were the range of frequencies of the signal is very wide.
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