Patent ID: 6766266
Filing Date: 2004-07-20
Classification: G01R,G09G

Abstract:
A testing device for a semiconductor integrated circuit which semiconductor integrated circuit incorporates a multiple number of D/A converters and outputs voltages from the D/A converters via associated output terminals, comprising:a reference voltage generator which sequentially generates a multiple number of reference voltages, one reference voltage at a time, to be compared to each output voltage output from each of the output terminals and can selectively output multiple sets of reference voltages required for testing multiple kinds of semiconductor integrated circuits; a multiple number of differential amplifiers, each having two input terminals, one for sequentially receiving the output voltage output from the associated output terminal and the other for sequentially receiving the reference voltage from the reference voltage generator; and a comparator that receives the amplified output voltages from the multiple number of differential amplifiers and judges whether the amplified output voltage from each of the differential amplifiers falls within a given voltage range.