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A signal flow graph method for analogue implementation of wavelet transform using switched-current circuits is proposed in which the wavelet transform is synthesized by a bank of switched-current bandpass filters whose impulse responses are the mother wavelet and its dilations. To facilitate the implementation of arbitrary wavelet function, the proposed approach employs the signal flow graph methodology...
A general scheme for the VLSI implementation of wavelet transform using switched-current (SI) circuits is firstly presented in this paper. SI circuits are well suited for this application since the dilation constant across different scales of the transform can be precisely implemented and controlled by both the transconductance (W/L) ratios and the clock frequency. The circuits are composed of analog...
This paper firstly describes the design and implementations of wavelet filters using switched-current (SI) technology. Wavelet filter bank, whose impulse responses are the first derivative of Gaussian and its dilations, play a key role in analog hardware implementation of wavelet transform. The transfer functions of the filters can be given by Pade approximation, which is able to decompose the transfer...
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