A pitch synchronous switched capacitor discrete Fourier transform circuit

A novel pitch-synchronous switched capacitor (SC) discrete Fourier transform (DFT) circuit suitable for high-speed spectral analysis is proposed. This circuit can analyze a harmonic signal synchronously with the pitch period of the signal, and it takes less than 0.2 ms to analyze 32 spectral components. Moreover, it is possible that all the proposed circuits can be integrated into one LSI package since they are constructed using the SC technique.<
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