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An N-symbol discrete Fourier transform (N -DFT) processor based on analog CMOS current mirrors that operate in the strong inversion region is presented. It is shown that transistor mismatch can be modeled as an input-referred noise source that can be used in system-level studies. Simulations of a radix-2, 256-symbol fast Fourier transform (FFT) show that the model produces equivalent results to those...
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