Increase in reliability of on-line testing methods using natural time redundancy

This paper addresses to questions of on-line testing for the computing circuits processing the approximate data. A problem of low reliability of on-line testing methods in checking the result is considered. This problem is connected to ignoring the natural time redundancy, which allows detecting the errors produced by the circuit fault during some interval of time. It reduces detection probability of errors, which are essential to reliability of result. The increase of this probability leads to detection of inessential errors and reduces reliability of on-line testing methods. The method of segments checking, which provides check of segments in the calculated result with the error detection probabilities determined by the natural time redundancy, is offered. This method significantly increases reliability in checking the result.