A novel VLSI sampled-data adaptive filter

A new type of VLSI voltage mode sampled-data adaptive filter architecture is described, The proposed approach uses arithmetic operations in the analog domain to make a circuit level analogy of a specific digital adaptive algorithm. The feedforward characteristic of the delay line allows filter operation at higher frequencies than previously reported. A bandpass adaptive filter with central frequency at 1 MHz and quality factor of ten, demonstrates the feasibility of the proposed approach for a sampling frequency of 20 MHz.