Patent ID: 6161117
Filing Date: 2000-12-12
Classification: G06F,G11C

Abstract:
A waveform generating device for generating waveform patterns to be used in dynamic burn-in testing of synchronous dynamic random access memories (SDRAMs), comprising:a pattern bit strings storing unit storing pattern bit strings corresponding to each of a plurality of control signals for the dynamic burn-in testing, each bit constituting the pattern bit string corresponding to one cycle of a non-return zero (NRZ) waveform;a pattern bit string reading unit reading pattern bit strings out from said pattern bit strings storing unit; anda waveform generating unit generating non-return zero (NRZ) and return zero (RZ) waveforms corresponding to said plurality of control signals, one cycle of the waveforms corresponding to a plurality of consecutive bits in the pattern bit string that has been read out.