Implementations of Continuous-Time Memory Structures
unsrt Abstract| The continuous-time implementation of the popular transversal lter is problematic since it is impossible to implement an ideal time delay in continuoustime hardware. We believe that building an ideal time delay would not be worthwhile anyway since the ideal time delay has shown to be inferior to low-pass (Gamma) and all-pass (Laguerre) stages in discrete-time simulations. We demonstrate feedforward analog VLSI implementations of the Gamma and Laguerre memory structures and show measurements of their performance. We also show through simulation of a system identi cation problem that the Laguerre lter is expected to converge faster and be more robust to the noise and o sets that we expect in an analog VLSI implementation.