A novel square-root domain realization of first order all-pass filter
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Date
2010
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Tubitak Scientific & Technological Research Council Turkey
Open Access Color
GOLD
Green Open Access
Yes
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No
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Abstract
In this paper a new square-root domain first order all-pass filter based on the MOSFET square law is presented. The proposed filter is designed by using nonlinear mapping on the state variables of a state space description of the transfer function. To the best knowledge of the authors the filter is the first square-root domain first order all-pass structure designed by using state space synthesis method in the literature. The center frequency of the all-pass filter is not only attainable at megahertz frequencies but also tunable by an external bias current. The proposed filter operated 2.5 V supply voltage is constructed by current mirrors geometric mean circuits a linear transconductor circuit and a capacitor. SPICE simulations are given to approve the theoretical analysis.
Description
Keywords
Mühendislik- Elektrik ve Elektronik, State-Space Synthesis, Slate-Space Synthesis, Mühendislik, Elektrik Ve Elektronik, Square-Root Domain Circuits, All-Pass Filter
Fields of Science
0202 electrical engineering, electronic engineering, information engineering, 02 engineering and technology
Citation
[1] Y. P. Tsividis V. Gopinathan L. T´oth “Companding in signal processing” Electronics Letters Vol. 26 pp. 1331– 1332 1990.[2] R. W. Adams “Filtering in the log-domain” Presented at 63rd AES Conference May 1979.[3] E. Seevinck “Companding current-mode integrator: A new circuit principle for continuous-time monolithic filters” Electronics Letters Vol. 26 No. 24 pp. 2046–2047 1990.[4] D. R. Frey “State space synthesis of log domain filters” IEEE International Symposium on Circuits and Systems 1 pp. 481–484 1997.[5] D. R. Frey “Log-domain filtering: an approach to current mode filtering” IEE Proc.-G Circuits Devices and Systems Vol. 140 No. 6 pp. 406–416 1993.[6] D. R. Frey “Exponential state-space filters: A generic current-mode design strategy” IEEE Trans. on Circuits and Systems-I: Fundamental Theory and Application Vol. 43 pp. 34–42 1996.[7] C. Toumazou J. Ngarmnil T.S Lande “Micropower log-domain filter for electronic cochlea” Electronics Letters Vol. 30 No. 22 pp. 1839–1841 1994.[8] M. H. Eskiyerli A. J. Payne C. Toumazou “State space synthesis of integrators based on the MOSFET square law” Electronics Letters Vol. 32 No. 6 pp. 505–506. 1996.[9] R. Schaumann M. E. V Valkenburg. Design of analog filters.Oxford: Oxford University Press, 2001.[10] S. Ozoguz T. M. Abdelrahman A. S. Elwakil “Novel Approximate Square-Root Domain All-pass Filter with Application to Multiphase Oscillators” Analog Integrated Circuits and Signal Processing Vol. 46 No. 3 pp. 297– 301 2006[11] A. Kırcay & U. Cam A novel first-order log-domain all-pass filter Int. Journal of Electronics and Communications (AEUE) Vol. 60 No. 6 pp. 471–474 2006.[12] K. Bult A. Wallinga “A class of analog CMOS circuits based on the square-law characteristic of an MOS transistor in saturation” IEEE Journal of solid-state circuits Vol. 22 No. 3 pp. 357–365 1987.[13] G. Yu C. Huang B. Liu J. Chen “Design of Square-Root Domain Filters” Analog Integrated Circuits and Signal Processing Vol. 43 pp. 49–59 2005.
WoS Q
Scopus Q
OpenCitations Citation Count
1
Source
Turkish Journal of Electrical Engineering and Computer Sciences
Volume
18
Issue
1
Start Page
141
End Page
146
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