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

Offset voltage due to clock feedthrough in the adapting part of analog least mean square (LMS) adaptive filters causes serious degradation of the filter's convergence and error performance. A compensation scheme and its circuit level implementation are described. The scheme eliminates the clock...

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Bibliographic Details
Published in[1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems pp. 587 - 590 vol.1
Main Author Qiuting, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1992
Subjects
Adaptive filters
Circuits
Clocks
Degradation
Delay lines
Finite impulse response filter
IIR filters
Least squares approximation
Steady-state
Voltage
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Summary:Offset voltage due to clock feedthrough in the adapting part of analog least mean square (LMS) adaptive filters causes serious degradation of the filter's convergence and error performance. A compensation scheme and its circuit level implementation are described. 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. They demonstrate the effectiveness of this offset cancellation scheme.< >
ISBN:9780780305106
0780305108
DOI:10.1109/MWSCAS.1992.271255