A new approach to organizing testing of combinational devices is described;the approach implies initial compression of signals from working outputs of the test object to the binary four-digit vector and its subsequent...
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A new approach to organizing testing of combinational devices is described;the approach implies initial compression of signals from working outputs of the test object to the binary four-digit vector and its subsequent transformation to the code word of the constant-weight "1-out-of-4" code. This approach allows reducing the complexity of technical implementation of the test circuit by decreasing the number of checked functions in the compression circuit. The number of testing organization variants of combinational devices is rather large, because it is possible to choose the compressed functions and the techniques for transforming each data vector to the code word of the "1-out-of-4" code. The paper shows that the new approach to organizing self-checking combinational devices allows improving the characteristics of distortion detection in data vectors in comparison with the traditional approach to organizing testing of devices by parity, even without special circuit analysis methods.
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