Being the manner which does the death queue of the 1st and 2nd

摘要

In the automatic inspection system, it allows the deskewing technique of the driver circuit, a differential signal crosses at or near the 50% point. First and second driver circuits coupled respectively to the first and second inputs of the measurement circuit is reflected respectively, and generates an edge, this edge propagates toward the DUT, and to reach the mismatched load the DUT come back Te. Inspection system measures each input of the measurement circuit, the time interval between the reflected and this edge. In series, the variable delay circuit is provided for each of the driver circuit. In response to the time interval measured, the signal from the first and second driver circuits reliably to reach the DUT at substantially the same time, the inspection system adjusts the variable delay circuit.