Adaptive switched-capacitor filters based on the LMS algorithm

Menzi, U.; Moschytz, G.S.

doi:10.1109/81.269034

Cited by 26 publications

(3 citation statements)

References 12 publications

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“…Thus, one of the interesting directions of the further work is improving the SCC efficiency by reducing the R eq . It should be noted that the switched capacitors were used previously to build the least mean square adaptive filters [29]. However, these filters use also others analog components, such as the operational amplifiers.…”

Section: Discussionmentioning

confidence: 99%

A Seminumerical Transient Analysis of Switched Capacitor Converters

Kushnerov

2014

IEEE J. Emerg. Sel. Topics Power Electron.

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The paper proposes an algebraic approach to transient analysis of switched capacitor converters (SCCs). To this end, the SCC is considered as an analog computer that solves the system of linear equations by an iterative method. The result of each iteration represents a point in the step response, whereas the function between the points is reconstructed. To simplify the derivation of the iterative method, each SCC topology is considered as a first-order circuit. The developed method is written as a recurrence relation and under certain conditions can be reduced to the well-known Kaczmarz method. The theoretical predictions were verified by simulations and experimentally and agree well with the results obtained by the equivalent resistance concept.Index Terms-Analog computers, charge pumps, convergence of numerical methods, discrete-time systems, iterative methods, switched capacitor circuits. 2168-6777

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Section: Discussionmentioning

confidence: 99%

A Seminumerical Transient Analysis of Switched Capacitor Converters

Kushnerov

2014

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Many SC integrators can be configured in such a way that it compensates the offset error due to the op-amp [7]. Such integrators have been incorporated into SC LMS adaptive filters to elliminate the opamp offset [4]. The offset due to clock feed-through, however, cannot be compensated by a special integrator topology itself.…”

Section: Introductionmentioning

confidence: 99%

Compensation of clock feedthrough induced offset in analog adaptive FIR filters based on the LMS algorithm

Huang

[1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems

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Offset voltage, due clock feedthrough, in the adapting part of analog LMS adaptive filters, causes serious degradation of the filter's convergence and error performance. A compensation scheme and its circuit level implementation is described in this paper. The scheme eliminates the clock-induced offset because the latter is the same for all weight integrators. Computer simulations at both algorithmic and circuit level are presented, which demonstrate the effectiveness of this offset cancellation scheme. J 1 1 1 J J J 1 I

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“…Although some publications have treated DC offsets in adaptive filters [2], [8][9][10][11], few results are available on the effects of all sources of DC offsets on all four variations of the LMS algorithm.…”

Section: Introductionmentioning

confidence: 99%