Journal of Guangxi Teachers Education University (Philosophy and Social Sciences Edition) ›› 2021, Vol. 39 ›› Issue (2): 81-89.doi: 10.16088/j.issn.1001-6600.2020032402

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Harmonic Analysis and Anti-aliasing Research of N-path Band-stop Filter

JIANG Pinqun, GU Shen, SONG Shuxiang*, CEN Mingcan   

  1. College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China
  • Received:2020-03-24 Revised:2020-04-24 Online:2021-03-25 Published:2021-04-15

Abstract: The interference of harmonic aliasing in N-path band-stop filter is a common problem, resulting in higher requirements for its interferer-tolerant performance. Firstly, the harmonic transfer functions relating the input to the voltage sampled on the capacitor are derived using the adjoint network, which simplifies the calculation of the harmonic transfer functions. Then the complete harmonic transfer functions of N-path band-stop filter are derived which are verified by the simulation of the circuit. The influence of filter parameters on harmonic aliasing is analyzed in UMC110 CMOS technology. It is concluded that the aliasing interference can be effectively suppressed by appropriately increasing the number of paths or the capacitance. The simulation result shows, that the max harmonic folding of the filter can be controlled below -27 dB, which has good anti-aliasing effect when the channel number is 16 and the capacitance is 50 pF. A cascaded design scheme of N-path band-stop filter and pre-frequency-selected device is proposed to eliminate harmonic folding. The cut-off frequency should be less than N-1 times the central frequency of N-path filter.

Key words: N-path filter, band-stop filter, switch capacitor, harmonic, harmonic aliasing, adjoint network

CLC Number: 

  • TN713
[1] FRANKS L E,SANDBERG I W.An alternative approach to the realization of network transfer functions:the N-path -lter[J].Bell System Technical Journal,1960,39(5):1321-1350.DOI:10.1002/j.1538-7305.1960.tb03962.x.
[2]刘国伦.可调谐N通道滤波器的研究与设计[D].桂林:广西师范大学,2019.
[3]刘国伦,宋树祥,岑明灿,等.带宽可调带阻滤波器的设计[J].广西师范大学学报(自然科学版),2018,36(3):1-8.DOI:10.16088/j.issn.1001-6600.2018.03.001.
[4]ABDULAZIZ M,KLUMPERINK E A M,NAUTA B,et al.Improving receiver close-in blocker tolerance by baseband Gm-C notch filtering[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2019,66(3):885-896.DOI:10.1109/TCSI.2018.2872469.
[5]AGRAWAL A,NATARAJAN A.An interferer-tolerant CMOS code-domain receiver based on N-path filters[J].IEEE Journal of Solid-State Circuits,2018,53(5):1387-1397.DOI:10.1109/JSSC.2017.2777821.
[6]HAMZA A,ALSHAMMARY H,HILL C,et al.A series N-path code selective filter for transmitter rejection in full-duplex communication[J].IEEE Microwave and Wireless Components Letters,2019,29(1):38-40.DOI:10.1109/LMWC.2018.2883723.
[7]LI C S,LI M,VERHELST M,et al.On the general mathematical framework,calibration/compensation method,and applications of non-ideal software de-ned harmonics rejection transceivers[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2015,62(1):292-301.DOI:10.1109/TCSI.2014.2348054.
[8]ONG Z H,SATO T.An improved differential N-path filter with sampling computation for increased stopband rejection ability[C]//2017 17th International Symposium on Communications and Information Technologies(ISCIT).Piscataway,NJ:IEEE,2017:1-6.DOI:10.1109/ISCIT.2017.8261206.
[9]PARK J W,RAZAVI B.A Harmonic-Rejecting CMOS LNA for Broadband Radios[J].IEEE Journal of Solid-State Circuits,2013,48(4):1072-1084.DOI:10.1109/JSSC.2013.2237651.
[10]SOER M C M,KLUMPERINK E A M,DE BOER P T,et al.Uni-ed frequency-domain analysis of switched-series-RC passive mixers and samplers[J].IEEE Transactions on Circuits and Systems-I:Regular Papers,2010,57(10):2618-2631.DOI:10.1109/TCSI.2010.2046968.
[11]GHAFFARI A,KLUMPERINK E A M,SOER M C M,et al.Tunable high-Q N-path band-pass -lters:modeling and veri-cation[J].IEEE Journal of Solid-State Circuits,2011,46(5):998-1010.DOI:10.1109/JSSC.2011.2117010.
[12]GHAFFARI A,KLUMPERINK E A M,NAUTA B.Tunable N-path notch -lters for blocker suppression:modeling and veri-cation[J].IEEE Journal of Solid-State Circuits,2013,48(6):1370-1382.DOI:10.1109/JSSC.2013.2252521.
[13]DUIPMANS L,STRUIKSMA R E,KLUMPERINK E A M,et al.Analysis of the signal transfer and folding in N-path filters with a series inductance[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2015,62(1):263-272.DOI:10.1109/TCSI.2014.2354772.
[14]KONSTANTINOVSKY I,COHEN E.N-Path filter model simulation and verification at high frequencies[C]//2017 IEEE International Conference on Microwaves,Antennas,Communications and Electronic Systems(COMCAS).Piscataway,NJ:IEEE,2017:1-5.DOI:10.1109/COMCAS.2017.8244811.
[15]KISHIDA K,MAEDA T.Simple,analytical expressions of an effect of local signal imperfections on four-phase passive-mixer-based bandpass filter[J].IEEE Transactions on Circuits and Systems I:Regular papers,2019,66(1):147-160.DOI:10.1109/TCSI.2018.2857624.
[16]PAVAN S,KLUMPERINK E.Simpli-ed uni-ed analysis of switched-RC passive mixers,samplers,and N-path filters using the adjoint network[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2017,64(10):2714-2725.DOI:10.1109/TCSI.2017.2703579.
[17]PAVAN S,KLUMPERINK E.Analysis of the effect of source capacitance and inductance on N-path mixers and -lters[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2018,65(5):1469-1480.DOI:10.1109/TCSI.2017.2754342.
[18]PAVAN S,KLUMPERINK E.Generalized analysis of high-order switch-RC N-path mixers/filters using the adjoint network[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2018,65(10):3267-3278.DOI:10.1109/TCSI.2018.2816342.
[19]PAVAN S,RAJAN R S.Interreciprocity in linear periodically time-varying networks with sampled outputs[J].IEEE Transactions on Circuits and Systems II:Express Briefs,2014,61(9):686-690.DOI:10.1109/TCSII.2014.2335393.
[20]IIZUKA T,ABIDI A A.FET-R-C circuits:a uni-ed treatment—part I:signal transfer characteristics of a single-path[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2016,63(9):1325-1336.DOI:10.1109/TCSI.2016.2579161.
[21]ANDREWS C,MOLNAR A C.A passive mixer-first receiver with digitally controlled and widely tunable RF interface[J].IEEE Journal of Solid-State Circuits,2010,45(12):2696-2708.DOI:10.1109/JSSC.2010.2077151.
[22]GUO Y,SHEN L,YANG F,et al.A 0.5-2 GHz high frequency selectivity RF front-end with series N-path filter[C]//2015 IEEE International Symposium on Circuits and Systems(ISCAS).Piscataway,NJ:IEEE,2015:2217-2220.DOI:10.1109/ISCAS.2015.7169122.
[23]LIU Z X,LI H Y,JIANG H Y,et al.A low power SAW-less 2.4-GHz receiver with an LC matched series N-path filter[C]//2018 IEEE International Symposium on Circuits and Systems(ISCAS).Piscataway,NJ:IEEE,2018:1-5.DOI:10.1109/ISCAS.2018.8351304.
[24]LIN Z C,MAK P I,MARTINS R P.Analysis and modeling of a gain-boosted N-path switched-capacitor bandpass filter[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2014:61(9):2560-2568.DOI:10.1109/TCSI.2014.2312476.
[25]XU Y,ZHU J X,KINGET P R .A blocker-tolerant RF front end with harmonic-rejecting N-path filter[J].IEEE Journal of Solid-State Circuits,2018,53(2):327-339.DOI:10.1109/JSSC.2017.2778273.
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