Very high speed real-time IIR digital filter structures: suitable for VLSI implementation

Techniques are presented to realize very high-speed, linear, time-invariant and recursive digital filters, such that the achieved throughput rates are not limited by the atomicity of the basic operation of the device used to implement them. The usual constraint in realizing very high speed infinite impulse response (IIR) filters is that only one delay is tolerated in the feedback path. In order to overcome it, the given transfer function is suitably modified. The resulting scheme consist of several processing paths, which can be implemented by multiprocessing systems that use commercial processors. The present structures are made up of modules which are repeated many times over with mainly local interconnections. Hence, they possess substantial potential to be implemented on VLSI´s