Square‐root domain linear transformation filters

Stoumpou, Eleni; Psychalinos, Costas

doi:10.1002/cta.655

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…As a result, the proposed SRD biquads will be fully compatible with nowadays' industry demands for systems with low‐voltage operation capability. Another benefit is that the realization of SRD integrators using the cell in Figure offers a significant reduction of the circuit complexity in comparison with the corresponding topologies where geometric mean and squarer/divider cells have been utilized . This will be also verified in the next Section through comparison results.…”

Section: Srd Building Blocks and Realization Of Biquadsmentioning

confidence: 73%

“…This is originated from the fact that the voltages at integration nodes have limited swing due to the compression of the input current that is performed by the input non‐linear current‐to‐voltage conversion stage. Another benefit is the capability for electronic adjustment of the frequency characteristics of SRD filters, due to the electronically controlled time constants .…”

Section: Introductionmentioning

confidence: 99%

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1.5 V square‐root domain universal biquad filters

Laoudias

Psychalinos

Stoumpou

2011

Circuit Theory & Apps

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Square-root domain universal biquad topologies are introduced in this paper. One of them is single input multiple output, while the other one is multiple input single output biquad. Important benefits offered by the proposed topologies are the electronic adjustment of the resonant frequency and the capability for operating in a low-voltage environment; also, the resonant frequency could be adjusted without disturbing the Q factor and vice-versa. Simulation results using the Spectre simulator of the Analog Design Environment of Cadence software validate the correct operation of the proposed topologies and provide important performance characteristics.

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Section: Srd Building Blocks and Realization Of Biquadsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

1.5 V square‐root domain universal biquad filters

Laoudias

Psychalinos

Stoumpou

2011

Circuit Theory & Apps

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“…The concept of LT filtering has been applied in the cases of conventional linear, log-domain and square-root domain filters (Dimopoulos & Constantinides, 1978;Hwang, Chiu, Liu, Wu, & Wu, 1995;Hwang, Liu, Wu, & Wu, 1994;Liu & Liao, 1996;Psychalinos, 2008b;Stoumpou & Psychalinos, 2011). According to the authors' best knowledge, this has not been yet applied in the case of Sinh-Domain filters.…”

Section: Introductionmentioning

confidence: 98%

Sinh-Domain linear transformation filters

Khanday

Kasimis

Psychalinos

et al. 2013

International Journal of Electronics

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A new systematic method for designing Sinh-Domain linear transformation (LT) filters is introduced in this article. For this purpose, a substitution scheme containing the Sinh-Domain LT equivalent of each passive prototype has been introduced. The proposed equivalents have been realised by employing appropriate Sinh-Domain building blocks with low-voltage operation capability. As an example, a third-order Sinh-Domain elliptic LT filter has been designed and its performance has been evaluated through simulation results. In addition, a detailed comparison with the corresponding Sinh-Domain and log-domain counterparts has been performed and the obtained results have been further discussed.

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“…The LC filter synthesis and the effects of tolerance on the circuit design are investigated in literature [5][6][7][8][9]. In the article [10], new filter solutions obtained directly by applying the corresponding passive LC ladder prototype filter are described.…”

Section: Introductionmentioning

confidence: 99%

New class of filter functions generated directly by the modified Christoffel–Darboux formula for classical orthonormal Jacobi polynomials

Pavlović

2012

Circuit Theory & Apps

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The new solution of determining the prototype analogue filter function as the response that satisfies the specifications of all pole low-pass continual time filter functions of odd and even order is presented in this article.The approximation problem of filter function was solved mathematically, applying the summed Christoffel-Darboux formula for the orthonormal polynomials. The starting point in solving the approximation problem is the direct application of the Christoffel-Darboux formula for the initial set of continual Jacobi orthonormal polynomials in the finite interval [À1, + 1] in full respect to the weighting function with two free real parameters.Solution for the monotonic and non-monotonic filter functions is obtained in an explicit form, which is shown to enable generation of the Jacobi filter functions in a simple way by choosing the values of the free real parameters.Moreover, the proposed solution with the same criterion of approximation is used to generate for particular specifications the appropriate best known classical approximation functions of free parameters: the Gegenbauer, Legendre, and Chebyshev filter functions of the first and second kind as well. The example of the proposed all-pole low-pass lossless LC filter in the frequency domain for frequency responses of the 11th-order filter is illustrated.This work is concerned with the approximation of an all-pole low-pass filter to design a circuit assuring an optimum realization of the required specifications. The article proposes new class filter functions with an approach to ideal filter magnitude characteristic. of the free parameters: r = 0.25,a = 0.222, and b = 0.555. The values of the group delay function at the origin and at the cutoff frequency are t(Ω = 0) = 8.2764 s and t(Ω p = 1) = 21.306 s, respectively.

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Square‐root domain linear transformation filters

Cited by 6 publications

References 28 publications

1.5 V square‐root domain universal biquad filters

1.5 V square‐root domain universal biquad filters

Sinh-Domain linear transformation filters

New class of filter functions generated directly by the modified Christoffel–Darboux formula for classical orthonormal Jacobi polynomials

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