应用于卫星导航射频芯片的可重构有源 RC 滤波器

Reconfigurable Active RC Filter for Satellite Navigation RF IC

提出1种应用于卫星导航射频芯片的三阶巴特沃斯可重构有源RC低通滤波器,其3 dB带宽覆盖范围为0.2~40 MHz,增益覆盖范围为0~30 dB。采用SMIC 55 nm CMOS工艺设计,在1.3 V的电源电压下,滤波器功耗为6.5 mW。后仿真结果显示,在增益和带宽为30 dB和14 MHz时,此滤波器的三阶输入交调截止点(Third Order Input Intercept Point,IIP3)为7.2 dBm,无杂散动态范围(Spurious Free Dynamic Range,SFDR)为55.1 dB。

A third-order Butterworth reconfigurable active RC low-pass filter applied to satellite navigation RF chips is proposed with a 3 dB bandwidth coverage of 0.2 MHz to 40 MHz and a gain coverage of 0 dB to 30 dB.Using SMIC 55 nm CMOS process design,the filter power consumption is 6.5 mW at the supply voltage of 1.3 V.The simulation results show that when the gain and bandwidth are 30 dB and 14 MHz,the Third Order Input Intercept Point(IIP3)of the filter is 7.2 dBm.Spurious Free Dynamic Range(SFDR)is 55.1 dB.