US Patent 7969171 Test circuit and system

A test circuit and system for testing one or more electrical properties of an electronic circuit or other device under test (DUT) by applying and monitoring test signals to the DUT is disclosed. The test circuit can utilize a plurality of universal interface channel circuits in a single automated test system to provide a unique and flexible approach for testing electronic circuits or devices that has many advantages. A single data acquisition circuit can be coupled to one or more universal interface channel circuits. Each of the universal interface channel circuits can be independently commanded by the data acquisition circuit to provide one of a variety of test signals to a DUT as desired.