A wide tuning range Active-RC filter for multi-mode applications

This paper presents a 6
^th
-order Active-RC filter for multi-mode applications. The filter exploits Butterworth structure with digitally-controlled resistor and capacitor arrays, which is flexible for bandwidth tuning. The chip is fabricated in SMIC 0.13μm CMOS process, occupies an area of 0.83mm
²
. The measurement results indicate the filter provides a wide tuning range from 400kHz to 20MHz and achieves an IIP3 of +20dBm with 1.2V power supply and the power consumption is 8.16mW.