A low-power reconfigurable analog filter for UMTS/WLAN receivers

A highly integrated low-power analog filter in 0.13μm CMOS able to be reconfigured in order to be used in UMTS and WLA N applications is reported. The order low-pass continuous-time filter is embedded in the receiver path. The filter is made up by the cascade of 2 Active G_m-RC low-pass biquadratic cells. The use of Active G_m-RC cells guarantees law power performance since they use low fu opamps. Thus, it presents low cost and low power characteristics. In fact, a little area overhead is required since the filter can share capacitors as well as opamps in both operations modes.