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This paper presents a reconfigurable and programmable analogue low pass filter for low voltage wireless applications. The proposed filter may be used for channel or band selection in multi-mode receiver front ends employing direct frequency conversion. The circuit has been synthesized using state variables and leapfrog OTA-C techniques, features programmable order, digitally variable frequency parameters and wide linear range. The fundamental OTA cell has been implemented with fully balanced second-generation current conveyors, suitable for operating with low supply voltages. Transistor level simulations based on a 180 nm digital CMOS technology have demonstrated the functionality of the design.
Słowa kluczowe
Rocznik
Tom
Strony
76--81
Opis fizyczny
Bibliogr. 10 poz., rys.
Twórcy
autor
autor
autor
autor
autor
autor
- Technical University of Cluj-Napoca, Str. Daicoviciu 17, 400027, Romania, gabor.csipkes@bel.utcluj.ro
Bibliografia
- [1] Mittola J., “The Software Radio Architecture”,IEEE Communications Magazine, 1995, pp. 26-38.
- [2] Maurer L., , “On the Architectural Design of Frequency Agile Multi-standard Wireless Receivers”. In:14 IST Mobile and Wireless Communications Summit, Dresden, June 2005.
- [3] Selex Communications, Wideband Structural Antenna Operating in the HF Range, Particularly for Naval Installations; patent, 2006.
- [4] “Reconfigurable SDR Equipment and supporting Networks.Reference Models and Architectures”,Wireless World Research Forum, white paper, 2004.
- [5] Csipkes D., , “Synthesis method for state variable Gm-C filters with a reduced number of active components”,MIXDES 2003, pp. 292-297.
- [6] Hintea S., , “On the Design of a Reconfigurable OTA-C Filter for Software Radio”. On:NASA/ESA Conference on Adaptive Hardware and Systems (AHS2007).
- [7] K. Koli, K. Halonen,Cmos Current Amplifiers: Speed Versus Nonlinearity, Kluwer, 2002.
- [8] Liu S., Tsao H., Wu J., “CCII Based Continuous-Time Filters with Reduced Gain-Bandwidth Sensitivity”,IEE Proceedings-G, vol.138, 1991, pp. 210-216.
- [9] Kardontchik J.E.,Introduction to the Design of Transconductor-Capacitor Filters, Kluwer, 1992.
- [10] Forghani-Zadeh H.P., Rincon-Mora G.A., “A Continuous,Low-Glitch, Low-Offset, Programmable Gain and Bandwidth Gm-C Filter”, 48 Midwest Symposium on Circuits and Systems, vol. 2, 7 -10 August 2005, pp. 1629-1632.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0028-0011