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Journal articles on the topic 'N-path filter'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ikehara, Masaaki, and Shinichi Takahashi. "Uniform filter bank containing N-path digital filter." Electronics and Communications in Japan (Part III: Fundamental Electronic Science) 72, no. 5 (1989): 62–70. http://dx.doi.org/10.1002/ecjc.4430720508.

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2

Tian, F. Y., and X. N. Jiang. "Novel switched-capacitor pseudo-N-path filter." Electronics Letters 29, no. 11 (1993): 1018–19. http://dx.doi.org/10.1049/el:19930679.

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3

Mohammadpour, Amin, and Abdolreza Nabavi. "Design and Analysis of an N-Path Filter with High Out-of-Band Rejection Using Feed-Forward Technique." Journal of Circuits, Systems and Computers 28, no. 03 (2019): 1950053. http://dx.doi.org/10.1142/s0218126619500531.

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This paper presents an N-path filter with high out-of-band rejection using feed-forward technique. The structure utilizes two four-path filters, one as the main-path and the other as auxiliary-path, and two TIAs to increase the order of the filter from two to four. As a result of this, and due to using two series resistors in the main path, the out-of-band rejection is significantly improved. Analysis and simulations show that the series resistors can be chosen such that the NF degradation is below 2[Formula: see text]dB while the out-of-band rejection is improved by about 20[Formula: see text]dB. Therefore, the trade-off between the insertion-loss and out-of-band rejection is relaxed compared to conventional N-path filter. Also, it is shown that decreasing the size of baseband capacitors improves the NF of the filter. The effect of clock phase-noise on NF of the filter in the presence of strong out-of-band blocker is modeled and simulated.

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4

Lu, Zhijian, Jing Jin, Tingting Mo, and Jianjun Zhou. "Analysis of Input LCR Matched $N$ -Path Filter." IEEE Transactions on Circuits and Systems I: Regular Papers 63, no. 6 (2016): 795–805. http://dx.doi.org/10.1109/tcsi.2016.2538098.

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5

Thomas, Chris M., and Lawrence E. Larson. "Broadband Synthetic Transmission-Line N-Path Filter Design." IEEE Transactions on Microwave Theory and Techniques 63, no. 10 (2015): 3525–36. http://dx.doi.org/10.1109/tmtt.2015.2473161.

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6

Lee, Yoon-Ki, and Young-Sik Kim. "Design of a 900 MHz Wake-Up Receiver Using an N-Path Filter." Journal of Korean Institute of Electromagnetic Engineering and Science 30, no. 10 (2019): 814–22. http://dx.doi.org/10.5515/kjkiees.2019.30.10.814.

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7

Hasan, M. Naimul, Shahrokh Saeedi, Qun Jane Gu, Hjalti H. Sigmarsson, and Xiaoguang Liu. "Design Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape." IEEE Transactions on Microwave Theory and Techniques 66, no. 6 (2018): 2775–90. http://dx.doi.org/10.1109/tmtt.2018.2809573.

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8

Badiyari, Kamlesh, Nagarjuna Nallam, and Shouri Chatterjee. "An N-Path Band-Pass Filter With Parametric Gain-Boosting." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 10 (2019): 3700–3712. http://dx.doi.org/10.1109/tcsi.2019.2918699.

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9

Thomas, Chris M., and Lawrence E. Larson. "A CMOS Broadband Distributed ${\rm N}$-Path Tunable Bandpass Filter." IEEE Microwave and Wireless Components Letters 24, no. 8 (2014): 542–44. http://dx.doi.org/10.1109/lmwc.2014.2321254.

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10

Betts, A. K., and J. T. Taylor. "Finite-gain-insensitive circulating-delay type pseudo-N-path filter." Electronics Letters 26, no. 23 (1990): 1941. http://dx.doi.org/10.1049/el:19901256.

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11

Song, Pingyue, and Hossein Hashemi. "RF Filter Synthesis Based on Passively Coupled N-Path Resonators." IEEE Journal of Solid-State Circuits 54, no. 9 (2019): 2475–86. http://dx.doi.org/10.1109/jssc.2019.2923561.

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12

Pandel, J., D. Bruckmann, A. Fettweis, et al. "Integrated 18th-order pseudo-N-path filter in VIS-SC technique." IEEE Journal of Solid-State Circuits 21, no. 1 (1986): 48–56. http://dx.doi.org/10.1109/jssc.1986.1052481.

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13

Pandel, J., D. Bruckmann, A. Fettweis, et al. "Integrated 18th-order pseudo-N-path filter in VIS-SC technique." IEEE Transactions on Circuits and Systems 33, no. 2 (1986): 158–66. http://dx.doi.org/10.1109/tcs.1986.1085889.

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14

Tavassoli, Mahdi, and Ali Jalali. "A Miller N-Path Bandpass Filter with Improved Second Harmonic Rejection." Circuits, Systems, and Signal Processing 38, no. 6 (2018): 2403–21. http://dx.doi.org/10.1007/s00034-018-0983-5.

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15

Darvishi, Milad, Ronan van der Zee, Eric A. M. Klumperink, and Bram Nauta. "Widely Tunable 4th Order Switched G$_m$-C Band-Pass Filter Based on N-Path Filters." IEEE Journal of Solid-State Circuits 47, no. 12 (2012): 3105–19. http://dx.doi.org/10.1109/jssc.2012.2225542.

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16

Xu, Yang, Jianxun Zhu, and Peter R. Kinget. "A Blocker-Tolerant RF Front End With Harmonic-Rejecting $N$ -Path Filter." IEEE Journal of Solid-State Circuits 53, no. 2 (2018): 327–39. http://dx.doi.org/10.1109/jssc.2017.2778273.

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17

Kwan, H. K. "Nonlinear delayed N-path adaptive IIR digital filter for nonlinear system modelling." Electronics Letters 29, no. 12 (1993): 1109. http://dx.doi.org/10.1049/el:19930740.

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18

RETDIAN, Nicodimus, and Takeshi SHIMA. "Power Line Noise Reduction for Bio-Sensing Applications Using N-Path Notch Filter." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A, no. 2 (2017): 541–44. http://dx.doi.org/10.1587/transfun.e100.a.541.

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19

Mohammadpour, Amin, Baktash Behmanesh, and Seyed Mojtaba Atarodi. "An N-Path Enhanced-Q Tunable Filter With Reduced Harmonic Fold Back Effects." IEEE Transactions on Circuits and Systems I: Regular Papers 60, no. 11 (2013): 2867–77. http://dx.doi.org/10.1109/tcsi.2013.2256238.

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20

Lin, Zhicheng, Pui-In Mak, and Rui P. Martins. "Analysis and Modeling of a Gain-Boosted N-Path Switched-Capacitor Bandpass Filter." IEEE Transactions on Circuits and Systems I: Regular Papers 61, no. 9 (2014): 2560–68. http://dx.doi.org/10.1109/tcsi.2014.2312476.

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21

Shang, Zhongxia, Yang Zhao, and Yong Lian. "A Low Power Frequency Tunable FSK Receiver Based on the N-Path Filter." IEEE Transactions on Circuits and Systems II: Express Briefs 66, no. 10 (2019): 1708–12. http://dx.doi.org/10.1109/tcsii.2019.2931840.

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22

Zhang, Hong, Yunbing Hou, Zhenming Sun, et al. "An Optimal Algorithm for Planning Shearer Trailing Drum Cutting Path." Shock and Vibration 2021 (August 20, 2021): 1–13. http://dx.doi.org/10.1155/2021/1354705.

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The intelligent adaptive cutting of the shearer is one of the key technologies to realize the intelligent working face. However, since the “memory cut” technology is the mainstream technology, which cannot actively adapt to the coal seam variations, the trailing drum usually cuts at a fixed height without a planned cutting path. This paper analyzes the shearer’s location characteristics before and after the advancement to propose a complete calculation method for the advancing path of the shearer, which simulates all of its possible advancing paths for subsequent n cuttings. The multitree and depth-first search algorithms are utilized to filter out the optimal advance path under different mining requirements. Simultaneously, this paper indicates that the vertical curvature of the armored face conveyor (AFC) should be considered in the calculation process of the optimal advancing path at different positions of the working face to obtain the shearer’s planned cutting path for subsequent n cuttings. The proposed algorithm in this paper has apparent advantages over the “memory cut” technology and provides a good solution for the intelligent planning of cutting and pitch steering of the shearers.

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23

Hamza, Ahmed, Hussam Alshammary, Cameron Hill, and James F. Buckwalter. "A Series ${N}$ -Path Code Selective Filter for Transmitter Rejection in Full-Duplex Communication." IEEE Microwave and Wireless Components Letters 29, no. 1 (2019): 38–40. http://dx.doi.org/10.1109/lmwc.2018.2883723.

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24

Tavassoli, Mahdi, and Ali Jalali. "Analysis of an Enhanced-Q N-Path Filter with Improved Even-Order Harmonic Rejection." Circuits, Systems, and Signal Processing 37, no. 3 (2017): 939–64. http://dx.doi.org/10.1007/s00034-017-0580-z.

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25

AFIFAH, Khilda, and Nicodimus RETDIAN. "Design of N-path Notch Filter Circuits for Hum Noise Suppression in Biomedical Signal Acquisition." IEICE Transactions on Electronics E103.C, no. 10 (2020): 480–88. http://dx.doi.org/10.1587/transele.2019ctp0009.

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26

Elmi, Mohammad, Mahdi Tavassoli, and Ali Jalali. "A wideband receiver front-end using 1st and 3rd harmonics of the N-path filter response." Analog Integrated Circuits and Signal Processing 94, no. 3 (2018): 451–67. http://dx.doi.org/10.1007/s10470-017-1096-y.

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27

Krishnamurthy, Sashank, Filip Maksimovic, Lorenzo Iotti, and Ali M. Niknejad. "Analysis and Design of Submilliwatt Interference-Tolerant Receivers Leveraging N-Path Filter-Based Translational Positive Feedback." IEEE Transactions on Microwave Theory and Techniques 69, no. 7 (2021): 3496–509. http://dx.doi.org/10.1109/tmtt.2021.3076823.

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28

B. Jadhav, Sachin, and Nikhil Niwas Mane. "A Novel High Speed FPGA Architecture for FIR Filter Design." International Journal of Reconfigurable and Embedded Systems (IJRES) 1, no. 1 (2012): 1. http://dx.doi.org/10.11591/ijres.v1.i1.pp1-10.

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<em><strong> </strong></em>This paper presents the details of hardware implementation of linear phase FIR filter using merged MAC architecture. Speed of convolution operation of FIR filter is improved using merged MAC architecture. By exploiting the reduced complexity made possible by the use of sparse powers of two partial products terms coefficients, an FIR filter tap can be implemented with 2B full adders, and 2B latches, where B is intermediate wordlegnth. Word and bit level parallelism allows high sampling rates, limited only by the full adder delay. The proposed architecture is based on binary tree constructed using modified 4:2 and 5:2 compressor circuits. Increasing the speed of operation is achieved by using higher modified compressors in critical path. Our objective of work is, to increase the speed of multiplication and accumulation operation by minimizing the number of combinational gates using higher n: 2 compressors, which is required more for Array multiplier at the time of implementation of array architecture. This novel architecture allows the implementation of high sampling rate filters of significant length on FPGA Spartan-3 device (XC3S400 PQ-208). The simulation result shows convolution output of digital FIR filter which is done using Questa Sim 6.4c Mentor Graphics tool. The experimental test of the proposed digital FIR filter is done using Spartan-3 device (XC3S400 PQ-208)

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29

Ostman, Kim B., Mikko Englund, Olli Viitala, et al. "Analysis and Design of N-Path Filter Offset Tuning in a 0.7–2.7-GHz Receiver Front-End." IEEE Transactions on Circuits and Systems I: Regular Papers 62, no. 1 (2015): 234–43. http://dx.doi.org/10.1109/tcsi.2014.2358331.

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30

Liu, Zexue, Yongan Zheng, Jiayi Wang, et al. "A 2.4-mW interference-resilient receiver front end with series N-path filter-based balun for body channel communication." International Journal of Circuit Theory and Applications 46, no. 11 (2018): 2118–33. http://dx.doi.org/10.1002/cta.2519.

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31

Lee, Donggu, and Kuduck Kwon. "CMOS Tunable Channel-selection LNA Employing Active Feedback Technique and Gain-boosted N-path Bandpass Filter for Advanced Cellular Applications." JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE 20, no. 5 (2020): 423–29. http://dx.doi.org/10.5573/jsts.2020.20.5.423.

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32

Fu, Sheng-Meng. "A monolithic sigma-delta fractional-N frequency synthesizer with implicit dual-path filter and phase switching multi-modulus frequency divider." Analog Integrated Circuits and Signal Processing 51, no. 3 (2007): 145–53. http://dx.doi.org/10.1007/s10470-007-9041-0.

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33

Nguyen, Hoai-Nam, Ki-Su Kim, Seon-Ho Han, Ja-Yol Lee, Cheonsoo Kim, and Sang-Gug Lee. "A Low-Power Interference-Tolerance Wideband Receiver for 802.11af/ah Long-Range Wi-Fi With Post-LNA Active $N$ -Path Filter." IEEE Transactions on Microwave Theory and Techniques 66, no. 5 (2018): 2287–98. http://dx.doi.org/10.1109/tmtt.2018.2805341.

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34

Boukhayma, Assim, Antoine Dupret, Jean-Pierre Rostaing, and Christian Enz. "A Low-Noise CMOS THz Imager Based on Source Modulation and an In-Pixel High-Q Passive Switched-Capacitor N-Path Filter." Sensors 16, no. 3 (2016): 325. http://dx.doi.org/10.3390/s16030325.

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35

Purushothaman, Vijaya Kumar, Eric A. M. Klumperink, Berta Trullas Clavera, and Bram Nauta. "A Fully Passive RF Front End With 13-dB Gain Exploiting Implicit Capacitive Stacking in a Bottom-Plate N-Path Filter/Mixer." IEEE Journal of Solid-State Circuits 55, no. 5 (2020): 1139–50. http://dx.doi.org/10.1109/jssc.2019.2959489.

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36

Langmore, John P., Michael F. Smith, and Debby A. Rankert. "Quantitative Energy-Filtered CRYO-EM of Hydrated Chromosome Fibers, Viruses, and Heavy Atoms." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 1 (1990): 252–53. http://dx.doi.org/10.1017/s042482010018001x.

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We have calculated and experimentally measured the extent to which energy filtration improves the S/N in phase- and scattering-contrast images of frozen-hydrated molecules. Multiple scattering calculations based on PW (partial wave) complex scattering amplitudes agree quantitatively with 80 KV image intensities of 50-500nm-thick ice. For an objective aperture of 2.5 nm-1 the PW elastic mean free path is 280 nm. From the ratio of filtered to unfiltered image intensities from 50-500 nm of ice at 80 KV, we calculate an empirical inelastic mean free path of 180 nm. The PW calculations show that Beer's Law should be obeyed for thicknesses up to five mean free paths, whether or not energy filtration is used. Thus the bright-field signal can be used to determine the absolute mass distribution of molecules embedded in thick ice layers.Energy filtration removes background intensity due to inelastic scattering (Fig.1a), and increases the scattering signal from molecules (becoming the sum of both elastic electrons excluded by the objective aperture and inelastic electrons excluded by the energy filter). As the result, the calculated contrast is 2-15 times greater in the Zeiss EM902 than in a TEM without energy filtration (Fig.1b). 80 KeV energy-filtered images of frozen-hydrated molecules should have a higher S/N than unfiltered images taken at intermediate or high voltage (Fig. 1c,d). TMV contrast and S/N is improved by filtration and agrees with calculations (Fig.1b,2). The advantages of energy-filtration are important to the microscopy of chromatin fibers, which are excluded from ice layers ≤200 nm and viruses, which are usually excluded from layers ≤100 nm. Radial density reconstructions from near-focus energy-filtered images of frozen-hydrated chromatin from Thyone sperm show that the centers are not hollow, but very dense, probably containing DNA (Fig.3). Energy-filtered images of icosahedral viruses in even the thinnest possible ice have a much improved S/N ratio, decreasing the dose required for analysis (Fig.2a,b).

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37

Guan, Shuo, Hong Tao Zhang, Chun Xu Wu, Lin Bo Cheng, and Tao Ning. "Study on Using CBF to Treat High Nitrogen and Low Carbon Wastewater." Advanced Materials Research 550-553 (July 2012): 2369–72. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2369.

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This study puts forward the Combined Biological Filter (CBF) as a new type of BAF for advanced treatment of industrial wastewater by changing its position of aeration, particularly for treating high nitrogen with low carbon wastewater. A chemical fertilizer plant is selected to put this set of CBF device after its wastewater treatment station. Methanol is used as external carbon resource for this CBF system. Operating parameters, such as the hydraulic loading rate and C/N ratio, are discussed to determine optimal ones: 0.64m3/ (m2•h) and 4:1. Path analysis is recorded to find different contribution of anoxic and aerobic zones of CBF reactor, and different working conditions are compared to find the best performance. CBF process could find further applications and improvement in engineering practices.

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38

Poursaadati Zinjanab, Ali, Mohammad Elmi, and Ali Jalali. "A standard-blocker tolerant receiver front-end using noise-canceling LNA with passive N-path filter and variable pulse-width multi-phase clock generator." Analog Integrated Circuits and Signal Processing 97, no. 3 (2018): 579–91. http://dx.doi.org/10.1007/s10470-018-1331-1.

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39

Poursaadati Zinjanab, Ali, Ali Jalali, and Hamed Taghipour Farshi. "A standard and harmonic blocker tolerant receiver front-end using a harmonic rejection differential N-path notch filter and blocks withstand to possible variations." AEU - International Journal of Electronics and Communications 125 (October 2020): 153356. http://dx.doi.org/10.1016/j.aeue.2020.153356.

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40

Leaper, David, Mark Albrecht, and Robert Gauthier. "Forced-air warming: a source of airborne contamination in the operating room?" Orthopedic Reviews 1, no. 1 (2009): 28. http://dx.doi.org/10.4081/or.2009.e28.

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Forced-air-warming (FAW) is an effective and widely used means for maintaining surgical normothermia, but FAW also has the potential to generate and mobilize airborne contamination in the operating room. We measured the emission of viable and non-viable forms of airborne contamination from an arbitrary selection of FAW blowers (n=25) in the operating room. A laser particle counter measured particulate concentrations of the air near the intake filter and in the distal hose airstream. Filtration efficiency was calculated as the reduction in particulate concentration in the distal hose airstream relative to that of the intake. Microbial colonization of the FAW blower’s internal hose surfaces was assessed by culturing the microorganisms recovered through swabbing (n=17) and rinsing (n=9) techniques. Particle counting revealed that 24% of FAW blowers were emitting significant levels of internally generated airborne contamination in the 0.5 to 5.0 mm size range, evidenced by a steep decrease in FAW blower filtration efficiency for particles 0.5 to 5.0 mm in size. The particle size-range-specific reduction in efficiency could not be explained by the filtration properties of the intake filter. Instead, the reduction was found to be caused by size-range-specific particle generation within the FAW blowers. Microorganisms were detected on the internal air path surfaces of 94% of FAW blowers. The design of FAW blowers was found to be questionable for preventing the build-up of internal contamination and the emission of airborne contamination into the operating room. Although we did not evaluate the link between FAW and surgical site infection rates, a significant percentage of FAW blowers with positive microbial cultures were emitting internally generated airborne contamination within the size range of free floating bacteria and fungi (<4 mm) that could, conceivably, settle onto the surgical site.

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41

Kazeminia, Sarang, Khayrollah Hadidi, and Abdollah Khoei. "A Wide-Range Low-Jitter PLL Based on Fast-Response VCO and Simplified Straightforward Methodology of Loop Stabilization in Integer-N PLLs." Journal of Circuits, Systems and Computers 24, no. 07 (2015): 1550104. http://dx.doi.org/10.1142/s0218126615501042.

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A straightforward methodology of optimizing ring-oscillator phase-locked loops (PLLs) is organized for integer-N PLLs. Then, a brief 4-step design flow is concluded to implicitly quantize the loop components for optimized loop stability. Theoretical analysis confirms that the ratio of more than 20 is required for loop filter's capacitors to yield at least 65° degrees phase margin. A wide-range voltage controlled oscillator (VCO) is proposed which is continuously controlled through two fast and slow response paths. The fast-response path improves RMS jitter due to decreasing loop delay and the slower one is an adaptive bias tuning loop, utilized to reduce the power consumption at lower operating frequencies. The RMS jitter of around 2 ps and 0.35 ps at 250 MHz and 4 GHz operating frequencies are obtained, respectively, where the 1.8 V supply voltage is subjected to about 60 mV peak-to-peak noise and reference clock suffers from 12 ps peak-to-peak jitter. Power consumption is reduced from 12.6–4 mW at 250 MHz operating frequency when the adaptive bias scheme is applied. Furthermore, simulation results confirm 35% and 50% improvement in RMS and peak-to-peak jitter at 250 MHz operating frequency, respectively, when the ratio of capacitances is increased from 10 to 20 within the loop filter. The proposed PLL can be implemented in 170 μm × 250 μm active area in 0.18 μm CMOS process.

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42

Qi, Gengzhen, Haijun Shao, Pui-In Mak, Jun Yin, and Rui P. Martins. "A Multiband FDD SAW-Less Transmitter for 5G-NR Featuring a BW-Extended N-Path Filter-Modulator, a Switched-BB Input, and a Wideband TIA-Based PA Driver." IEEE Journal of Solid-State Circuits 55, no. 12 (2020): 3387–99. http://dx.doi.org/10.1109/jssc.2020.3021687.

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43

Chen, Sizheng, Tingting Shi, Lei Ma, Cheng Kang, Na Yan, and Hao Min. "A Low Power Impedance Transparent Receiver with Linearity Enhancement Technique for IoT Applications." Wireless Communications and Mobile Computing 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/9130910.

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A low power receiver with impedance transparent RF front end is presented. By using the 4-path passive mixer and the active feedback of LNA, the baseband impedance profile is further transferred to receiver input. While a LO-defined input matching is formed by RF front end, the linearity of entire receiver chain is improved. Furthermore, derivative superposition technique is employed to cancel the distortion of the CMOS LNA. A 3rd-order active-RC filter is designed with current-efficient feedforward compensated OTA. And a digital-to-time converter (DTC) assisted fractional-N all-digital phase-locked loop (ADPLL) is codesigned with receiver to meet the IoT requirements. The presented receiver is fabricated in 55 nm CMOS technology with an active area of 2.3 mm2 and power consumption of 20 mW. Measurement results show that the receiver achieves 5.3 dB NF with 78 dB gain from 0.6 to 1 GHz, the RX out-of-band IIP3 is +8 dBm, and in-band IIP3 is −10 dBm, and the ADPLL achieves −94 dBc/Hz in-band PN and −120.5 dBc/Hz at 1 MHz offset.

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44

Darvishi, Milad, Ronan van der Zee, and Bram Nauta. "Design of Active N-Path Filters." IEEE Journal of Solid-State Circuits 48, no. 12 (2013): 2962–76. http://dx.doi.org/10.1109/jssc.2013.2285852.

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45

Elmi, Mohammad, Ali Poursaadati Zinjanab, and Ali Jalali. "N × M-path filters: analysis and implementation." Analog Integrated Circuits and Signal Processing 96, no. 3 (2018): 543–54. http://dx.doi.org/10.1007/s10470-018-1170-0.

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46

Khaldun, M. Ibnu, Andang Widi Harto, and Yohannes Sardjono. "An Optimization Design of Collimator in The Thermal Column of Kartini Reactor For BNCT." Indonesian Journal of Physics and Nuclear Applications 2, no. 2 (2017): 54. http://dx.doi.org/10.24246/ijpna.v2i2.54-64.

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Studies were carried out to design a collimator which results in epithermal neutron beam for in vivo experiment of Boron Neutron Capture Therapy (BNCT) at the Kartini Research Reactor by means of Monte Carlo N-Particle (MCNP) codes. Reactor within 100 kW of thermal power was used as the neutron source. All materials used were varied in size, according to the value of mean free path for each material. MCNP simulations indicated that by using 6 cm thick of Natural Nickel as collimator wall, 65 cm thick of Al as moderator, 3 cm thick of Ni-60 as filter, 6 cm thick of Bi as γ-ray shielding, 3.5 cm thick of Li<sub>2</sub>CO<sub>3</sub>-polyethilene, with 2 cm aperture diameter. Epithermal neutron beam with maximum flux of 6.60 x 10<sup>8</sup>n.cm<sup>-2</sup>.s<sup>-1</sup> could be produced. The beam has minimum fast neutron and γ-ray components of, respectively, 1.82 x 10<sup>-13</sup>Gy.cm<sup>2</sup>.n<sup>-1</sup> and 1.70 x 10<sup>-13</sup> Gy.cm<sup>2</sup>.n<sup>-1</sup>, minimum thermal neutron per epithermal neutron ratio of 0.041, and maximum directionality of 2,12. It did not fully pass the IAEA’s criteria, since the epithermal neutron flux was below the recommended value, 1.0 x 10<sup>9</sup> n.cm<sup>-2</sup>.s<sup>-1</sup>. Nonetheless, it was still usable with epithermal neutron flux exceeding 5.0 x 10<sup>8</sup> n.cm<sup>-2</sup>.s<sup>-1</sup>. it is still feasible for BNCT in vivo experiment.

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47

Mitra, S., K. Mensa-Ababio, and K. Hirano. "Theory and applications of all-digital N-path filters." IEEE Transactions on Circuits and Systems 34, no. 9 (1987): 1045–52. http://dx.doi.org/10.1109/tcs.1987.1086265.

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48

Kwan, H. K. "New form of delayed N-path recursive digital filters." Electronics Letters 29, no. 9 (1993): 736. http://dx.doi.org/10.1049/el:19930494.

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Hameed, Sameed, Mansour Rachid, Babak Daneshrad, and Sudhakar Pamarti. "Frequency-Domain Analysis of $N$-Path Filters Using Conversion Matrices." IEEE Transactions on Circuits and Systems II: Express Briefs 63, no. 1 (2016): 74–78. http://dx.doi.org/10.1109/tcsii.2015.2482418.

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Tapen, Thomas, Zachariah Boynton, Hazal Yuksel, Alyssa Apsel, and Alyosha Molnar. "The Impact of LO Phase Noise in N-Path Filters." IEEE Transactions on Circuits and Systems I: Regular Papers 65, no. 5 (2018): 1481–94. http://dx.doi.org/10.1109/tcsi.2017.2761260.

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