Thao, Nguyen T.Vetterli, Martin2005-04-182005-04-182005-04-18199310.1109/ISCAS.1993.393686https://infoscience.epfl.ch/handle/20.500.14299/213220Lower bounds on the MSE in nth order multi-bit multi-loop SigmaDelta modulation with dc inputstext::conference output::conference proceedings::conference paper