A CMOS bandpass filter with wide-tuning range for wireless applications

A 2nd order RF bandpass filter with Q-enhancement active inductor is presented. In the filter, a design technique for a tunable Q-enhancement CMOS active inductor operating in the wide RF-band is described. Moreover, issues related to noise and stability of the active inductor is addressed. Simulated performance presented shows that the filter has about 50.6dB spurious free dynamic range (SFDR) at 2.45GHz with Qap30, and the center frequency of the filter using a 0.25-mum CMOS process can be operated at the 1.60G-2.45GHz frequency band under a 1.8V power supply. The filter is suited for multi-band wireless applications

[1]  Asad A. Abidi.  Noise in active resonators and the available dynamic range , 1992 .

[2]  Mohammed Ismail,et al.  RF bandpass filter design based on CMOS active inductors , 2003, IEEE Trans. Circuits Syst. II Express Briefs.

[3]  Yue Wu,et al.  A novel CMOS fully differential inductorless RF bandpass filter , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).

[4]  William B. Kuhn,et al.  Dynamic range performance of on-chip rf bandpass filters , 2003 .

[5]  William B. Kuhn,et al.  A 200 MHz CMOS Q-enhanced LC bandpass filter , 1996 .

[6]  Apinunt Thanachayanont.  CMOS transistor-only active inductor for IF/RF applications , 2002, 2002 IEEE International Conference on Industrial Technology, 2002. IEEE ICIT '02..

[7]  James W. Haslett,et al.  Tunable coupled inductor Q-enhancement for parallel resonant LC tanks , 2003, IEEE Trans. Circuits Syst. II Express Briefs.