The ideal averaging filter: its applications and realizations
J.B. Grimbleby · Radio and Electronic Engineer · 1979
The optimum filter for improving the signal/noise ratio in a commonly-encountered instrumentation situation is the ideal averaging filter. Various ways of realizing the ideal response are discussed and rational approximants of order 1 to 6 are given. The circuits required to implement these approximants are considerably less complex than those required for the alternative realizations.