Nahlik, J.; Mullane, B.; Hospodka, J.; Sovka, P.; O'Hare, D

25th IET Irish Signals & Systems Conference 2014 and 2014 China-Ireland International Conference on Information and Communications Technologies (ISSC 2014/CIICT 2014).

Optimized switched capacitor biquads for two-channel quadrature-mirror filter bank

2014

June

Published

1

()

CMOS integrated circuits;biquadratic filters;channel bank filters;integrated circuit design;operational amplifiers;optimisation;switched capacitor networks

Limerick

This paper deals with the design and optimization of biquadratic switched capacitor filters for 4^th order quadrature-mirror filter banks allowing for real switch effects (e.g. on-state resistance, charge injection...) and the folded cascode OpAmp designed in 0.35 um CMOS technology. The filter is designed as a cascade of two biquads and each filter is separately optimized using the Differential Evolution Algorithm to obtain the required transfer function with deviation of less than ±0.1 dB from the designed transfer function. The filters process a baseband signals (0 - 8 kHz) using a clock frequency of 16 kHz. The resulting capacitor values are presented.

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6912795&isnumber=6912720

doi: 10.1049/cp.2014.0724