Design of fully differential fourth-order Bessel filter with accurate group delay
作者： Jin-guang Jiang , Yi-gang He , Jie Wu
DOI: 10.1109/ICASIC.2001.982553
关键词: Active filter 、 Electronic engineering 、 Engineering 、 Electronic filter topology 、 Bessel filter 、 RLC circuit 、 Electronic filter 、 Low-pass filter 、 Group delay and phase delay 、 Prototype filter
摘要: A fully differential R-MOSFET-C fourth-order Bessel active lowpass filter employing passive resistances and current-steering MOS transistors as a variable resistance is proposed. This proposed implementation relies on the tunability of operating in triode region counteracting concert deviation integrated circuit manufacturing technology order that group delay could be designed accurately. 0.75 us filter, which synthesized according to doubly terminated RLC prototype demonstrates better than -65 dB THD with 100-kHz, 1.65-Vpp signal 3.3 V 0.5 um CMOS technology.
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