Pacemakers and other implantable devices detect events by real-time processing of cardiac signals. In order to create a sense amplifier, the mathematical modeling of cardiac signals and pathologies is necessary. From
this modeling step, real-time signal processing tools are developed to detect
events by exploiting the mathematical morphology of these signals. The focus
here is on wavelet transforms that can be implemented in analog circuits by
means of Dynamic Translinear Circuits, yielding a lower power consumption
than wavelet transforms in the digital domain. In order to implement wavelets
in the analog domain, the wavelet functions have to be approximated by the
impulse response of linear systems, where techniques as model-reduction,
Padé-approximation,
-approximation and simulation are being used.
