QMF-based A/D converters: overview and new results

Provides an overview of A/D converters incorporating a quadrature mirror filter bank. The major difference existing between these and the time-interleaved architectures (both make use of an array of A/D converters) is that, in the former case, suitable bandpass filters are used before and after the quantizers, reducing the effect of quantization noise produced by the array of A/D converters, as shown here. The noise introduced by the switched-capacitor filters, which implement the analysis filter bank in the QMF-based data converters, is estimated. Simulation results obtained with images are presented.