Akım Modlu Logaritmik Tabanlı AB Sınıfı Dördüncü Derece Chebyshev Alçak Geçiren Süzgeç Tasarımı
Year 2022,
Volume: 13 Issue: 3, 439 - 445, 30.09.2022
Ali Kırçay
,
Derya Barış Köroğlu
Abstract
Bu çalışmada akım modlu durum uzay sentez metodu kullanılarak, dördüncü derece fark alıcı AB sınıfı logaritmik ortam Chebyshev alçak geçiren filtre tasarlanmıştır. Önerilen filtrenin kesim frekansı 50Mhzdir. Tasarımda sadece npn tipi transistör , topraklı kapasitör ve 2.5 V besleme kaynağı kullanılarak çalışılmıştır. Süzgeç parametreleri kolayca değiştirilerek kesim frekansı ayarlanabilmektedir. Bu ayarlama akım değeri değiştirilerek yapılmaktadır. Literatürde bulunan Chebyshev süzgeçlere göre yüksek frekanslarda çalışıyor olması en büyük üstünlükleri arasında yer almaktadır. Teorik analiz sonuçları SPICE yardımıyla doğrulanmıştır. Tasarlanan filtre için ideal BJT ve AT&T CBIC-U2 tip transistör kullanılmıştır.
References
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Year 2022,
Volume: 13 Issue: 3, 439 - 445, 30.09.2022
Ali Kırçay
,
Derya Barış Köroğlu
References
- [1] R. W. Adams, ‘‘Filtering in the log-domain’’,Presented at 63rd AES Conference, New York, May 1979.
- [2] E. Seevinck, ‘‘Companding current-mode integrator: A new circuit principle for continuous-time monolithic filters’’ Electronics Letters, Vol.26, No.24, pp.2064- 2065, 1990.
- [3] D. R. Frey, ‘‘Log-domain filtering: an approach to current-mode filtering.’’ IEE Proc.-G, Circuits Syst. Devices, Vol.140, No.6, pp.406-416, Dec.1993.
- [4] Frey, D. R.; Tola, A. T., “A state-space formulation for externally linear class-AB dynamical circuits.” IEEE TCAS II: ,Vol.:46, Issue:3 Pages:306-314, 1999 .
- [5] Kırcay, A. ; Keselioğlu M. S. ; Adalar F. Z. , “Electronically Tunable Current-Mode Third-Order Square-Root-Domain Filter Design” Journal of Circuits, Systems, and Computers Vol. 27, No. 9 (2018) 1850136
- [6] Kırcay, A., 2007 “New Possibilities for the Design of Class-A and Differential Class-AB Log-Domain Filters Using State-Space Synthesis Method” Dokuz Eylul University, Graduate School of Natural and Applied Sciences, Doctor of Philosophy, Izmir.
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[9] Perry D, and Roberts G. W..“ Log-domain filters based on LC ladder synthesis” Proceedings of ISCAS'95 - International Symposium on Circuits and Systems , August 2002.
- [10] Leung V. W., Roberts G. W. “ Effects of Transistor Nonidealities on High-Order
Log-Domain Ladder Filter Frequency Responses ” IEEE Transactions On Cırcuıt And Systems—II: Analog And Dıgıtal Sıgnal Processıng, Vol. 47, No. 5, May 2000
- [11] Punzenberger M. , Enz C. C. “A 1.2-V Low-Power BiCMOS Class AB Log-Domain Filter ” IEEE Journal Of Solıd-State Cırcuıts, Vol. 32, No. 12, December 1997
- [12]Kardoulaki, E. 2011 “Cmos Hyperbolic Sıne Elın Fılters For Low/Audıo Frequency Bıomedical Applications” Imperial Collage London, Department of Bioengineering, , Doctor of Philosophy, London
- [13] Xu z., El-Masry E.I., “Synthesis Of Log-Domain Filter With Well-Defined Operating Point” IEEE International Symposium on Circuits and Systems (ISCAS), May 2004 .
- [14]. Frey, D. R. (1994). Current mode class-AB second order filter. Electronics Letters, 30, 205–206..