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Analysis and Optimization of Noise in Continuous-Time OTA-C Filters.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Jun2005, Vol. 52 Issue 6, p1086-1094. 9p. - Publication Year :
- 2005
-
Abstract
- A general procedure is presented for noise analysis and optimization in continuous-time operational transconductance amplifier (OTA)-C filters of arbitrary order and topology. Based on a matrix description of a general OTA-C filter structure, universal expressions are derived that permit computing the filter noise and optimizing the noise performance in any OTA-C filter. The results are not only useful for classical (discrete or integrated) OTA-C designs at medium to high frequencies but also in modern radio-frequency integrated circuits (RFICs) by carefully replacing transistors or electronic subcircuits by OTA (macro) models The formulas are easy to implement and are readily included in computer-aided analysis and optimization algorithms. The accuracy of the proposed algebraic method is confirmed by a coma parison with SPICE-simulation results. Two application examples are given: Finding the minimum-noise a multiple-loop-feedback filter configuration to implement fifth-order Butterworth and Bessel transfer functions, and determining the optimal biquad sequencing and gain distribution in a cascade realization of an eighth-order Butterworth filter. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 52
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 17394119
- Full Text :
- https://doi.org/10.1109/TCSI.2005.849142