[IEEE [Proceedings] 1992 IEEE International Symposium on Circuits and Systems - San Diego, CA, USA (3-6 May 1992)] [Proceedings] 1992 IEEE International Symposium on Circuits and Systems - Design of a 4 MHz sixth-order CMOS Bessel filter with 80-100 ns tunable delaySchaumann, R.; Wu, P.; Latham, P. · 1992