一种超高频高Q值CMOS带通滤波器设计

Design of the UHF High-Q CMOS Bandpass Filter

介绍了一种基于Nauta跨导一电容积分器的CMOS集成滤波器设计。在滤波器设计过程中，利用改进的Nauta导具有可调增益、高线性度、宽频域特点，使滤波器可工作在UHF频段并有高品质因数Q，仿真结果表明，所设计的滤波器采用Cllarted Semiconductor Manuhcturing（CSM）0．35um CMOS工艺，工作电压为3V，Q值可达到40-100，当中心频率为433MHz，Q值为40时，无杂散动态范围（SFDR）约为61．4dB，并可通过调节电路偏压达到对中心频率ωc和Q的调谐。

The paper is presented the design of the integrated CMOS Gm-C filter based on the Nauta＇ s transconductance. Using the improved Nauta＇s transconductance characteristics, the filter can be operated at ultra high frequency band and has a high quality factor Q adjusted gain, high linearity and wide-band frequency. The simulated results show that the proposed filter is used Charted Semiconductor Manufacturing （CSM） 0. 35 um CMOS process,power supply is 3 V and the quality factor of the filter is 40-100. The spurious-free dynamic range （SFDR） of the filter is about 61.4 dB when ωc=433 MHz,Qc=40,and the bias voltage can be adjusted the quality factor and the center frequency of the filter.