  We report on experimental demonstration of a mixed-signal 6-tap
finite-impulse response (FIR) filter in which weights are implemented with
titanium dioxide memristive devices. In the proposed design weight of a tap is
stored with a relatively high precision in a memristive device that can be
configured in field. Such approach enables efficient implementation of the most
critical operation of an FIR filter, i.e. multiplication of the input signal
with the tap weights and summation of the products from taps, in analog domain.
As a result, the proposed design, when implemented with fully integrated hybrid
CMOS/memristor circuit, is expected to be much more compact and energy
efficient as compared to the state-of-the-art approaches.
