Letter
Approximations of the inverse wavelet transform for analogue circuits
Fecha
2012Autor
Gurrola-Navarro, M.A.
Medina-Vazquez, A.S.
Espinosa-Flores-Verdad, G.
Institución
Resumen
We propose two approximations of the inverse wavelet transform implemented with a voltage adder and two analog filters. They work together with a set of scaled band-pass analog filters that perform the wavelet transform of a continuous time signal. With this approach an integrated circuit has been fabricated. On-chip measurements demonstrate signal to reconstruction error ratios up to 25.8 dB.