Patent ID: 7372288

Claim:
A test apparatus that tests a first device under test and a second device under test, the test apparatus comprising: a pattern generator that generates a common test pattern to be supplied to the first device under test and the second device under test; a signal output section that outputs a test signal based on the test pattern, said signal output section comprising a driver for outputting the test signal; a first switch that is provided between said driver and a terminal of the first device under test and selects whether said driver and the terminal of the first device under test are connected to each other; a second switch that is provided between said driver and a terminal of the second device under test and selects whether said driver and the terminal of the second device under test are connected to each other; a first termination resistor that terminates the output signal from said driver between said first switch and the terminal of the first device under test; a second termination resistor that terminates the output signal from said driver between said second switch and the terminal of the second device under test; and a substitute resistor that is decoupled from said driver when said first switch and said second switch connect said driver to the terminal of the first device under test and the terminal of the second device under test and is connected to said driver in place of said second termination resistor when said second switch disconnects said driver and the terminal of the second device under test.