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Parameter choice of analog limiters of the spectrum for digital signal processing systems considering tolerance and temperature instability of passive components

Keywords:

D.Yu. Denisenko – Post-graduate Student, Don State Technical University (Rostov-on-Don) E-mail: swallow5@mail.ru Yu.I. Ivanov – Ph. D. (Eng.), Associate Professor, Department of Automatic Control Systems, Academy of Engineering and technology of SFU (Taganrog) E-mail: таганрог@почта.рус N.N. Prokopenko – Dr. Sc. (Eng.), Professor, Head of Department «Information Systems and Radio Engineering», Head of Research Laboratory, Don State Technical University (Rostov-on-Don) E-mail: prokopenko@sssu.ru


On the base of computer simulation the qualitative and quantitative recommendations are given for choosing parameters of precision limiter of spectrum (of low-pass filter, antialiasing filter) for operation in the input circuit of analog-to-digital converter (ADC) of classical DSPS. We suggest making a choice of parameters of the low-pass filter (LPF) in such a way to obviate the need for its tuning. LPF is con-structed in two stages. At the first stage the requirements to the amplitude frequency characteristic (AFC) of LPF are formulated and the approximating task is solved. Then the order of transfer function of LPF and the character of AFC behavior in the bandpass ranges and attenuation bands are determined. At the second stage of construction we look for the circuit of LPF which allows realizing the found transfer function. The carried out analysis shows that the response rate of operational amplifiers and the tolerance for passive elements (resistors, ca-pacitors) cause the change of AFC of LPF mainly near its cutoff frequency. Due to this fact we suggest to choose the relative cutoff frequency of LPF 25−50% higher than the operating bandwidth of the signal processing system and to lead the high-sensitive AFC of LFP out of the operating band. However, it is possible only if the conversion frequency of ADC can be increased by 25−50% relating to cutoff frequency of LPF. As an example the results of simulation of the eighth order Chebyshev LPF are given at the spread of capacitor capacitance of ±1%, in-band ripple of 0.1 dB, stopband attenuation of 80 dB, cutoff frequency of LPF of 20 kHz, remanence ratio of amplitude frequency characteristic, equal to 2.3 when using starved operational amplifiers. The suggested choice of LPF parameters makes possible to refuse digital or analog setting of LPF parameters and to provide its oper-ation in the signal processing system with the specified characteristics.
References:

 

  1. Blachuta M.J. and Grygiel R.T. Are anti-aliasing filters necessary for PID sampled-data control? // Proceedings of the European Control Conference (ECC). Budapest. 2009. P. 4037−4042.
  2. Oppengejjm A., SHafer R. Cifrovaja obrabotka signalov. M.: Tekhnosfera. 2006. 856 s.
  3. Sergienko A.B. Cifrovaja obrabotka signalov: Ucheb. posobie. Izd. 3-e. SPb.: BKHV-Peterburg. 2011. 768 s.
  4. Šuránek P., Mahdal M. and Tůma J. Comparising of antialiasing filters in A/D converters // Proceedings of the 14th International Carpathian Control Conference (ICCC). Rytro. 2013. P. 373−376. doi: 10.1109/CarpathianCC.2013.6560572.
  5. Zaal R. Spravochnik po raschetu filtrov: Per. s nem. M.: Radio i svjaz. 1983. 752 s.
  6. Bukashkin S.A. i dr. Spravochnik po raschetu i proektirovaniju ARC-skhem / Pod red. A.A. Lanneh. M.: Radio i svjaz. 1984. 366 s.
  7. Moshic G., KHorn P. Proektirovanie aktivnykh filtrov: Per. s angl. M.: Mir. 1984. 320 s.
  8. Prokopenko N.N., Butyrlagin N.V., Krutchinsky S.G., Zhebrun E.A., Titov A.E. The Advanced Circuitry of the Precision Super Capacitances Based on the Classical and Differential Difference Operational Amplifiers // IEEE 18th International Symposium on Design and Diagnostics of Electronic Circuits & Systems (DDECS). 22−24 April 2015. Belgrade. Serbia. P. 111−114. doi: 10.1109/DDECS.2015.46.
  9. Krutchinskijj S.G., Ivanov JU.I., Grigorev V.S. Precizionnye ARC-zvenja vtorogo porjadka // Izvestija VUZov. Ser. Radioehlektronika. 1999. T. 42. № 8.
  10. Kapustjan V.I. Aktivnye RC-filtry vysokogo porjadka. M.: Radio i svjaz. 1985. 248 s.
  11. Kuflevskijj E.I., Ivanov JU.I. Skhemotekhnika i realizacija mikroehlektronnogo filtra nizhnikh chastot // Poluprovodnikovaja ehlektronika v tekhnike svjazi (Sb. statejj pod red. I.F. Nikolaevskogo). 1990. № 28. S. 63−67.
  12. Yao Li, Xuehua Zhang, Hongyu Liu. Evolutionary Design of a Second-Order Butterworth Lowpass Filter // 8th International Symposium on Computational Intelligence and Design (ISCID). 2015. V. 2. P. 532−535. doi: 10.1109/ISCID.2015.126.
  13. Ivanov JU.I., Molchanov A.JU., Rostik E.K., Singovskijj V.A., Cirulik D.V. Opyt razrabotki naborov oktavnykh i doli oktavnykh filtrov // Sb. trudov II Vseros. nauchnojj konf. molodykh uchenykh, aspirantov i studentov «Estestvoznanie i pedagogika» (STEP-2013). EHlista: Izd-vo JUzhnogo federalnogo universiteta. 2013. S. 186−189.
  14. Denisenko D.JU., Ivanov JU.I., Finaev V.I. O vlijanii parametrov operacionnykh usilitelejj na kharakteristiki integratorov // Otechestvennaja nauka v ehpokhu izmenenijj: Postulaty proshlogo i teorii novogo vremeni / Sb. trudov III Mezhdunar. nauchno-praktich. konf. Ekaterinburg: Izd-vo NAU. 2014. № 3. CH.2. S. 35−38.
  15. Denisenko D.JU., Denisenko M.E., Ivanov JU.I., Finaev V.I. Analogovye i diskretno-analogovye perestraivaemye integratory // Inzhenernyjj vestnik Dona. 2015. № 4. URL = ivdon.ru/ru/magazine/archive/n4y2015/3388.
  16. Hong-Yi Huang, Kun-Yuan Chen, Jia-Hao Xie, Ming-Ta Lee, Hao-Chiao Hong, Kuo-Hsing Cheng. Gm-C filter with automatic calibration scheme // IEEE 19th International Symposium on Design and Diagnostics of Electronic Circuits & Systems (DDECS). 2016. doi: 10.1109/DDECS.2016.7482471.
  17. Satyanarayana J.V., Ramakrishnan A.G. Reduction of the order of anti-aliasing filters in embedded avionics data acquisition // International Conference on Computer and Communications Technologies (ICCCT). 2014. DOI: 10.1109/ICCCT2.2014.7066704.

 

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