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The paper deals with the problem of design and FPGAbased realization of digital circuits with the current-mode gates -novel digital gates operating with constant, continuous power supply current. The purpose is the provision of a high level of noise immunity of chips, which contain both analog and digital circuits. Using proposed approach to design digital current-mode circuits, current-mode prototypes of several digital circuits and similar to Spartan II slice are designed. Obtained circuits are characterized by smaller hardware overheads and switching noise levels in comparison with the similar circuits based on the classical voltage type of gates. It indicates the possibility of realization of field programmable mixed analog-digital array on a single die.

A method of mapping DSP algorithms into FPGA devices is considered. Algorithms are represented by synchronous data flow graphs, and are mapped into pipelined data path. The method consists of placing the algorithm graph in the multidimensional index space and mapping it into structure and event subspaces. The special limitations, which are injected to the mapping process, minimize both clock time and hardware volume including multiplexer inputs.