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An oscillatory transmission line pulse generation system is introduced. This measurement system allows one to observe the response of an electrostatic discharge (ESD) protection device to a large-amplitude radio-frequency damped sinusoid; such waveforms mimic ESD tests. The trigger voltage of silicon-controlled rectifiers used for ESD protection is observed to be dependent on the past state of the device, due to charge storage in the bipolar bases.
Date of Publication: Feb. 2009