NOISE TESTING SYSTEM AND NOISE TESTING METHOD

摘要

PROBLEM TO BE SOLVED: To superimpose differential noise for test on a differential signal, with high accuracy.;SOLUTION: Noise generated by a noise generator 10 is distributed to a positive side delay circuit 31 and a negative side delay circuit 32 by a divider 20. Noises output by the positive side delay circuit 31 and the negative side delay circuit 32 are applied to respective signal lines, on the positive side and the negative side, constituting a differential transmission path via a coupling capacitor and a resistance. The resistance value of the resistor is set fully higher than a characteristic impedances of the respective signal lines on the positive side and on the negative side. Respective delay amounts of the positive side delay circuit 31 and the negative side delay circuit 32 are set so that they have delay differences from each other determined by a frequency of the noise generated by the noise generator 10 and amplitude of the differential noise to be applied to the differential transmission path through the respective resistances.;COPYRIGHT: (C)2010,JPO&INPIT