Patent ID: 6847211
Filing Date: 2005-01-25
Classification: G01R

Abstract:
1. An apparatus for calibrating voltage spikes used in testing an electrical device, comprising: a circuit having a plurality of phase voltage lines and a ground line, a plurality of phase voltage inputs and a ground input adapted for connection to a power source, each phase voltage input being connectable to a corresponding phase voltage line and the ground input being connected to the ground line, and a plurality of phase voltage outputs and a ground output adapted for connection to an electrical device under test, each phase voltage output being connected to a corresponding phase voltage line and the ground output being connected to the ground line; a selection circuit joined to the plurality of phase voltage lines for selecting one of the phase voltage lines and providing a synchronization voltage signal based on voltage signals across the phase voltage lines not selected by the selection circuit; a voltage spike generator joined to the selection circuit to receive the synchronization voltage signal for generating a predetermined voltage spike waveform based on the synchronization voltage signal; and additional circuitry joined to the voltage spike generator and the phase voltage lines and joined to said phase voltage outputs and said ground output for applying the predetermined voltage spike waveform across the selected phase voltage line and the ground line.