Efficient use of time and hardware redundancy for concurrent error detection in a 32-bit VLSI adder

The adder is intended to be used as a building block in the design of more complex circuits and systems using very large scale integration (VLSI). An efficient approach to error detection has been selected through extensive comparisons of several methods that use hardware, time, and hybrid redundancy. Simulation and analysis results are presented to illustrate the adder´s timing characteristics, hardware requirements, and error-detection capabilities. One novel feature of the analysis is the introduction of error latency as a means of comparing the error-detection capabilities of several alternative approaches.<>