A CMOS Converters - High speed data conversion using hybrid filter banks M.Sc., Tekn. Often the system performance is limited by the interfaces between analog and digital. We believe that there are only minor improvements to be gained by further lowlevel optimization of analog circuits.
Several converters work in parallel at a lower conversion rate than the total rate at the output.
In this way very high speed data conversion can be achieved. The harmonic distortion at the output caused by gain- and phase mismatch errors between the channels is attenuated by the filters. If calibration is to be performed, only frequencies in the transition regions of the filter banks need to be considered. Generation of skewed clock phases is not needed. The settling time of the sampling circuits can be M times longer, where M is the number of channels Most channels work with a reduced bandwith signal.