Title :
A 5M-50M reconfigurable Gm-C low-pass filter in 130nm CMOS for SDR receivers
Author :
Fu, Ling ; Chi, Baoyong ; Feng, Hongxing ; Wang, ZhiHua
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A third order Gm-C reconfigurable Butterworth low-pass filter for SDR receivers with a tunable cutoff frequency of 5M to 50M is presented. A positive feed-forward compensation Gm-cell is utilized to improve the linearity of the filter. The filter has been implemented in SMIC 130nm CMOS process. It occupies 0.63 mm2 die area and consumers 12mA - 16mA current with a 1.2V power supply. The measured in-band IIP3 is about 10.5dBm, and out-band IIP3 up to 26.3dBm.
Keywords :
Butterworth filters; CMOS integrated circuits; low-pass filters; SDR receiver; SMIC CMOS; current 12 mA to 16 mA; in-band IIP3 measurement; out-band IIP3 measurement; positive feed-forward compensation Gm-cell; size 130 nm; third order Gm-C reconfigurable Butterworth low-pass filter; voltage 1.2 V; Cutoff frequency; Linearity; Low pass filters; MOSFETs; RLC circuits; Transconductance; Tuning;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667739
