A statistical, coarse-sampled data filter

A digital filter design may be implemented with only one analog summing device, two shift registers with respective lengths equal to the orders of numerator and denominator, a generator of uniformly distributed analog noise, and either a simple low-pass RC filter or a counter. The principle of operation is based on polarity correlation. It has an economic advantage due to lack of storage and digital multipliers, but is applicable only when the data sampling rate is fairly low.