An apparatus to receive a response signal sent from a device under test. The apparatus includes pin electronics to identify a response signal contained in a composite signal. The composite signal is a composite, or sum, of the response signal and a test signal. The pin electronics has a driver to send...http://www.google.com/patents/US6563298?utm_source=gb-gplus-sharePatent US6563298 - Separating device response signals from composite signals
