Analog implementation of Morlet wavelet transform using switched-current circuits

In order to meet the application requirement in signal processing for low-voltage, low-power and real-time, a method for the analog implementation of Morlet wavelet transform (WT), based on switched current (SI) circuits, was proposed. Gaussian function generators play a key role in the analog hardware implementation of Morlet WT. The rational form of Gaussian function can be given with Pade approximation so that Gaussian function generator can be conveniently implemented with the cascade of SI first order section and second order section. Simulation results have shown that the method is feasible.