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

fYear

2001

fDate

2001

Firstpage

281

Lastpage

284

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;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2001. Proceedings. 4th International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-6677-8

Type

conf

DOI

10.1109/ICASIC.2001.982553

Filename

982553