Patent ID: 6498998
Filing Date: 2002-12-24
Classification: G01R,H03M

Abstract:
Semiconductor testing apparatus for testing a semiconductor device having an A-D converting unit that converts an analog signal to a digital signal, the apparatus comprising:a first waveform generating unit which generates a first waveform having a predetermined waveform component; a second waveform generating unit which generates a second waveform having a known waveform component, wherein said second waveform generating unit generates the second waveform based on a sampling clock which sets a sampling interval of the A-D converting unit; a waveform synthesizing unit which generates a composite waveform by synthesizing the first waveform and the second waveform; a processing unit which processes to remove an effect of the second waveform from an output value of the semiconductor device to which the composite waveform is input; and a comparator which judges whether or not the semiconductor device operates normally, based on the first waveform and the output value processed by said processing unit.