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