Patent ID: 7240259

Claim:
A coupling unit being adapted for coupling at least two ATE-pins of an automated test equipment—(ATE)— to a (DUT)-pin of a device under test—(DUT)—, comprising: an ATE interface adapted for at least one of: receiving a plurality of first stimulus signals from one or more of the ATE-pins and sending a plurality of second response signals to the ATE-pins, a DUT interface adapted for at least one of: sending a second stimulus signal to the DUT-pin and receiving a first response signal from the DUT-pin and at least one of: a multiplexer adapted for serializing data of the plurality of first stimulus signals into the second stimulus signal and a de-multiplexer circuit adapted for parallelizing data of the second response signal into the plurality of second response signals, and a clock circuit adapted for receiving a reference clock signal from a further ATE-pin and a further clock signal, and for generating a retiming clock signal by adjusting the phase of the further clock signal on the base of a comparison of the reference clock signal and a further clock signal.