Dual-Mode Logic for Function-Independent Fault Testing

This correspondence presents a oncept of function-independent testing of digital networks. It is based on the idea of dual-mode logic where the network is tested in one mode while the normal function of the network is performed in another mode, with neither mode interfering with the other. This correspondence simultaneously defines the structure of modules with the above characteristics such that combinational and sequential networks built with them can be tested with two and six function-independent tests, respectively.