JPS6478173A - Ic tester - Google Patents

Abstract

PURPOSE:To easily and instantly confirm a quantitative feature of a logical waveform and a variation at the time of waveform change by displaying simultaneously the logical waveform and logical information corresponding thereto and changing this display in accordance with an input of logical waveform change information. CONSTITUTION:To a CPU 49, a storage device 41 for storing the logical information corresponding to a logical waveform, a display 42 for displaying simultaneously the logical waveform and the logical information for showing its quantitative feature, and logical waveform generating circuits 43-45 for generating a control voltage corresponding to a shape of the logical waveform and applying it to an IC to be tested 70 are connected. In this state, when the logical information or the logical waveform is inputted from a keyboard 40, the CPU 49 stores the logical information in the storage device 41, and also, displays the logical waveform and the logical information on the display 42. Subsequently, when a desired logical waveform change instruction is inputted, the CPU 49 interprets this change instruction, rewrites the logical information of the storage device 41, and thereafter, reads it out, stores it in desired storage devices 46-48 belonging to the circuits 43-45, and on the other hand, generates the logical waveform by executing an arithmetic operation, and displays the logical information and the logical waveform on the display 42.