Frequency-Band-Decomposition converters using continuous-time Sigma-Delta A/D modulators

Frequency-band-decomposition (FBD) is a good candidate to increase the bandwidths of ADC converters based on sigma-delta modulators, especially in the context of software radio, where very large bands need to be converted. Each modulator processes a part of the input signal band and is followed by an adapted digital filter. A new solution, called extended frequency-band-decomposition (EFBD) has been proposed during the ANR VersaNUM project, allowing large mismatches in the analog modulators without performance degradation, at the price of a calibration of the digital stage. This paper is an abstract of the whole project and presents its main results.