0.13μm CMOS宽带大动态范围六阶跨导电容低通滤波器(英文)

6^(th) Order High Bandwidth High Dynamic Range G_m-C LPF in 0.13 μm CMOS

提出了一种适用于宽带大动态范围应用的六阶跨导电容低通滤波器。该滤波器为Chebyshev类型,采用开环级联结构来实现。通过一组开关电容阵列来补偿由工艺温度等因素引入的截止频率的偏差。实际测试结果表明,该滤波器的-3dB截止频率可调范围为30～100MHz,在500mVp-p输入信号幅度下,IM3为-48dB。电源电压为3V时,消耗电流25mA,芯片面积为0.5mm2。该滤波器采用TSMC0.13μm CMOS工艺实现。

A continuous time 6th order Gm-C low pass filter （LPF） for high bandwidth and high dynamic range application was presented. The filter was implemented with Chebyshev biquad cascade structure. A programmable switched-capacitor array was used to compensate the cut-off frequency variation induced by process, temperature etc. The measurement results indicate that the - 3 dB cut-off frequency can be tuned from 35 MHz to 100 MHz. The two-tone test shows that the in-band IM3 can achieve - 48 dB with 500 mVp-p input swing. Fabricated in TSMC 0.13μm CMOS technology, the proposed filter consumes 25 mA current with 3 V power supply and occupies 0.5 mm^2 area.