Ultra low-power analog morletwavelet filter in 0.18 μm BiCMOS technology

S.A.P. Haddad*, J.M.H. Karel, R.L.M. Peeters, R.l. Westra, W.A. Serdijn

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingAcademicpeer-review


A novel procedure to implement the wavelet transform using analog circuitry is presented. First, an approximation is used to calculate the transfer function of the filter, whose impulse response is the required wavelet. Next, to meet low-power low-voltage requirements, we optimize the state-space description of the filter with respect to dynamic range, sensitivity and sparsity. The filter design that follows is based on an orthonormal ladder structure and employs log-domain integrators as main building blocks. Measurements demonstrate that it approximates the required wavelet base (i.e. Morlet) in an excellent way. The tenth-order log-domain filter operates from a 1.5-V supply voltage and a total bias current of 4.3 mu A.
Original languageEnglish
Title of host publicationProceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005
ISBN (Print)0-7803-9205-1
Publication statusPublished - Sep 2005
Event31st European Solid-State Circuits Conference - Grenoble, France
Duration: 12 Sep 200516 Sep 2005
Conference number: 31


Conference31st European Solid-State Circuits Conference
Abbreviated titleESSCIRC 2005

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