Aydin I. Karsilayan Rolf Schaumann Automatic tuning of high-Q filters based on envelope detection. 668-671 1999 conf/iscas/1999 ISCAS (2) http://doi.ieeecomputersociety.org/10.1109/ISCAS.1999.780853 db/conf/iscas/iscas1999-2.html#KarsilayanS99