Title :
A class AB 6th order log-domain filter in BiCMOS with 100-500 MHz tuning range
Author :
Schmalz, Klaus ; Teplechuk, M.A. ; Sewell, J.I.
Author_Institution :
IHP, Frankfurt, Germany
fDate :
28 Aug.-2 Sept. 2005
Abstract :
A differential lowpass filter with tunable cutoff frequency 100-500 MHz for application in broadband WLAN has been designed and tested. The sixth-order Butterworth filter of class AB log-domain type with cascaded biquads and equal capacitors was synthesized by XFILTER software and implemented in BiCMOS. The noise figure of the filter is 30 dB, and the IIP3 is 7 dBm. The circuit is fabricated in 0.25 μm SiGe:C BiCMOS technology.
Keywords :
BiCMOS integrated circuits; Butterworth filters; Ge-Si alloys; biquadratic filters; carbon; cascade networks; integrated circuit design; low-pass filters; semiconductor materials; wireless LAN; 0.25 micron; 100 to 500 MHz; 30 dB; BiCMOS technology; SiGe:C; XFILTER software; broadband WLAN application; cascaded biquad filters; class AB 6th order log-domain filter; differential lowpass filters; equal capacitors; sixth-order Butterworth filters; tunable cutoff frequency; Application software; BiCMOS integrated circuits; Capacitors; Circuit synthesis; Circuit testing; Cutoff frequency; Filters; Tunable circuits and devices; Tuning; Wireless LAN;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523005
