Hervé Caracciolo Ivano Galdi Edoardo Bonizzoni Franco Maloberti Band-pass SigmaDelta architectures with single and two parallel paths. 1656-1659 2008 ISCAS http://dx.doi.org/10.1109/ISCAS.2008.4541753 conf/iscas/2008 db/conf/iscas/iscas2008.html#CaraccioloGBM08