Title :
Design of fully differential fourth-order Bessel filter with accurate group delay
Author :
Jiang, Jin-guang ; He, Yi-Gang ; Wu, Jie
Author_Institution :
Coll. of Electr. & Inf. Eng., Hunan Univ., Changsha, China
Abstract :
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 the current-steering MOS transistors operating in the triode region counteracting the concert deviation of resistance in integrated circuit manufacturing technology in order that the group delay of Bessel active filter could be designed accurately. 0.75 us group delay fourth-order Bessel lowpass filter, which is synthesized according to passive doubly terminated RLC prototype lowpass filter, demonstrates better than -65 dB THD with 100-kHz, 1.65-Vpp signal in 3.3 V 0.5 um CMOS technology
Keywords :
CMOS analogue integrated circuits; active filters; delay filters; low-pass filters; 0.5 micron; 100 kHz; 3.3 V; CMOS technology; current-steering MOS transistor; fully-differential R-MOSFET-C fourth-order Bessel active low-pass filter; group delay; integrated circuit design; passive resistance; triode region; tunability; variable resistance; Active filters; CMOS technology; Delay; Integrated circuit manufacture; Integrated circuit synthesis; Integrated circuit technology; MOSFETs; Passive filters; Signal design; Signal synthesis;
Conference_Titel :
ASIC, 2001. Proceedings. 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-6677-8
DOI :
10.1109/ICASIC.2001.982553
