Patent ID: 7157916
Filing Date: 2007-01-02
Classification: G01R

Abstract:
1. A test apparatus that tests an electronic device, comprising: a test module operable to supply test patterns used for testing the electronic device to the electronic device; a main signal source operable to generate a first timing signal for controlling timing at which said test module supplies the test patterns to the electronic device and to supply the first timing signal to one or more predetermined pin(s) of said test module; and a sub-signal source operable to receive a timing signal from said main signal source, and to generate a second timing signal for controlling timing at which said test module supplies the test patterns to the electronic device in accordance with a phase of the timing signal received from said main signal source, and to supply the second timing signal to one or more pin(s) different from the pin(s) of said main signal source among the pins of said test module, wherein said sub-signal source comprises a phase adjustment circuit that substantially uniforms the timing at which the main signal source outputs the first timing signal and the timing at which the sub-signal source outputs the second timing signal by delaying the timing signal received from the main signal source.