Abstract
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 language | English |
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Title of host publication | Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005 |
Publisher | IEEE |
Pages | 323-326 |
ISBN (Print) | 0-7803-9205-1 |
DOIs | |
Publication status | Published - Sept 2005 |
Event | 31st European Solid-State Circuits Conference - Grenoble, France Duration: 12 Sept 2005 → 16 Sept 2005 Conference number: 31 |
Conference
Conference | 31st European Solid-State Circuits Conference |
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Abbreviated title | ESSCIRC 2005 |
Country/Territory | France |
City | Grenoble |
Period | 12/09/05 → 16/09/05 |