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A non-recursive switched-capacitor filter implementation for narrow-band signal processing applications

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2 Author(s)
A. Petraglia ; COPPE, Univ. Fed. do Rio de Janeiro, Brazil ; S. K. Mitra

This paper considers the implementation of nonrecursive switched-capacitor filters realized in transversal form for narrow-band signal processing. Nonideal effects, such as finite gain and bandwidth of the operational amplifiers and capacitance mismatches, are studied. In particular, analytical formulas are derived to predict effects of capacitance mismatches and amplifier finite gain-bandwidth product, which can be taken into account when dimensioning devices in an integrated circuit implementation, to make the filter less sensitive to process variations. Computer simulations and experimental results obtained in the laboratory are presented to verify the main theoretical results

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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:47 ,  Issue: 9 )