A reconfigurable high ultimate rejection inductorless band‐pass filter by the use of N‐path passive mixers,International Journal of Circuit Theory and Applications

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A reconfigurable high ultimate rejection inductorless band‐pass filter by the use of N‐path passive mixers
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2020-11-02 , DOI: 10.1002/cta.2895
Amin Hazrati ₁ , Ali Jalali ₁ , Masoud Meghdadi ₁

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In this paper, a band‐pass filter with a tunable bandwidth and the center frequency is introduced, which employs N‐path and N × M‐path passive mixer structures, for multiband multistandard wireless receivers. The center frequency of the proposed filter is tunable from 0.1 to 1 GHz, while its bandwidth is also adjustable from 6% to 34% of the center frequency at 100 MHz. The passband ripple is reduced by applying a Miller compensation technique, resulting in a worst‐case ripple of only 1.6 dB over the entire tuning range. An additional eight‐path filter is also utilized at the input of the circuit, which highly improves the out‐of‐band rejection of the filter as well as its out‐of‐band linearity. The noise figure and the input return loss are, respectively, better than 5 and 10 dB, and depending on the desired center frequency, the total power consumption of the proposed filter varies from 41 to 70 mW.

中文翻译：

通过使用N路径无源混频器，可重构的高最终抑制无电感带通滤波器

本文介绍了一种带宽可调且中心频率可调的带通滤波器，它采用了N路径和N × M路径无源混频器结构，用于多频段多标准无线接收器。所提出的滤波器的中心频率可在0.1至1 GHz范围内调节，而其带宽也可在100 MHz时从中心频率的6％至34％范围内调节。通过应用Miller补偿技术，可以降低通带纹波，在整个调谐范围内，最坏情况下的纹波仅为1.6 dB。电路的输入端还使用了一个额外的八路径滤波器，这极大地改善了滤波器的带外抑制以及带外线性度。噪声系数和输入回波损耗分别优于5 dB和10 dB，并且取决于所需的中心频率，建议的滤波器的总功耗在41至70 mW之间变化。

更新日期：2020-11-02

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