Numerical recipes: the art of scientific computing
Numerical recipes: the art of scientific computing
A Methodology for Designing Continuous-Time Sigma-Delta Modulators
EDTC '97 Proceedings of the 1997 European conference on Design and Test
Extended frequency-band-decomposition sigma---delta A/D converter
Analog Integrated Circuits and Signal Processing
4- and 6-GS/s 4-bit frequency-translating hybrid ADCs in 90-nm CMOS
Analog Integrated Circuits and Signal Processing
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Frequency-band-decomposition (FBD) is a good candidate to be used to increase the bandwidths of ADC converters based on sigma-delta modulators for software and cognitive radio applications where we need to convert wide bandwidths. Each modulator processes a part of the band of the input signal which is then passed through a digital filter. In the case of large mismatches in the analog modulators, a new solution, called extended frequency-band-decomposition (EFBD) can be used. As an example, this solution can allow for a 4% error in the central frequencies without significant degradation of its performance when the digital processing part is paired with the analog modulators. A calibration of the digital part is thus required to reach these theoretical performances. This paper will focus on a self-calibration algorithm for an EFBD. The algorithm helps minimize the quantization noise of the EFBD and helps to flatten the signal transfer function.