A MONOLITHIC ANALOG 512 point chirp z transform(CZT)' processor which calculates the discrete time Fourier transform will be discussed. A 6.1 x 5.5mm N-channel MOS chip includes the premultiplication, convolution, and postmultiplication operations required to perform the full complex DFT a t a 50% duty cycle or a sliding DFT at a 100% duty cycle. Dynamic range of 63dB and operation from lkHz to 1.5MHz have been measured. Previous transform ICs of this length' have required extensive support circuitry, limitin…
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