A high-speed distributed-arithmetic realization of a second-order normal-form digital filter includes a filter input, a filter output, and a memory. The memory has a first input, a second input, and a third input. The first memory input is connected to the filter input. The memory also has a first output,...http://www.google.com/patents/US4811262?utm_source=gb-gplus-sharePatent US4811262 - Distributed arithmetic realization of second-order normal-form digital filter
