| 摘要 |
PURPOSE:To eliminate error of discrimination by obtaining the absolute value in difference between a signal to be discriminated and a reference signal and integrating by giving a difference in weight to rated value of the part of low absolute value and other part, and then judging the resemblance by a comparator. CONSTITUTION:A binary-coded signal to be discriminated is sent from an input IN to a comparator 3. On the other hand, a reference signal, which is a comparison signal, is binary-coded and enters from an input REF, and sent to the comparator 3 and the two signals are compared. The binary-coded signal to be discriminated entered from input IN is branched from there, and passes through the comparator covering above and below a threshold value, and obtains weighting signals from a weighting width setting circuit 7, and enter a weighting circuit 8. An output from the comparator 3 is also inputted to this circuits 8. Accordingly, an error signal of the width determined by the weighting width setting circuit 7 is not outputted from here. Therefore, an error in that extent can be reduced. When a switching circuit 8a shown in the figure is used in place of the weighting circuit 8, the switch is changed by the weighting width setting circuit 7, and it becomes possible to give a grade of weight in the value of degree of coincidence to output signals from the comparator. |
