Yikui Zhang Etsuro Hayahara Satoshi Hirano Naohito Sakakibara An Optimal Design Consideration for Higher-Order Delta-Sigma AD Converter. 103-114 2002 11 Journal of Circuits, Systems, and Computers 2 http://dx.doi.org/10.1142/S0218126602000343 db/journals/jcsc/jcsc11.html#ZhangHHS02