一种采用有源器件实现的射频有源带通滤波器

A RF Active Band-pass Filter Realized by Active Devices

针对目前智能化和小型化核检测仪表中的带通滤波器进行了研究,设计了一种采用有源电感和有源电容实现的射频有源带通滤波器。首先,分别对有源电感电路和有源电容电路的构成、工作原理和主要参数进行了分析,并得出了其仿真结果,以表明设计的实用性和合理性;然后,采用提出的有源电感电路和有源电容电路设计出了一款中心频率为1 GHz的射频有源带通滤波器;最后,基于0.18μm CMOS工艺设计制作和ADS仿真软件得到的仿真结果表明,所设计的滤波器电路具有低功耗、理想的S参数和低线性噪声性能,不仅可用于智能化和小型化核检测仪表的射频组件,也可用于多标准无线应用系统中实现高阶有源滤波器。

A research on the band-pass filters in current intelligent and miniaturized nuclear detection instruments is conducted,a RF active band-pass filter using active inductor and active capacitor is designed.Firstly,the composition,working principle and main parameters of active inductance circuit and active capacitance circuit are analyzed respectively,and their simulation results are obtained to show the practicability and rationality of the design.Then,a RF active bandpass filter with center frequency of 1 GHz is designed by using the proposed active inductor circuit and active capacitor circuit.Finally,the simulation results based on the 0.18μm CMOS process design and ADS simulation software show that the designed filter circuit has low power consumption,ideal S parameter and low linear noise performance.It can be used not only for the RF components of intelligent and miniaturized nuclear detection instruments,but also for the realization of high order active power filters in multi-standard wireless applications.