Other

Credence Systems Corporation

James Kaylor Larson

Steven Robert Payne

Daniel G Teichmer

Marc Loranger

Gordon Edward Chenoweth

Patricia Renee Justice

A system for testing an integrated circuit device under test (DUT) communicating though synchronous digital signals and through a high speed serialization/de-serialization (serdes) bus includes a serdes interface circuit for communicating with the DUT via the serdes bus and an integrated circuit (IC) tester for communicating with the DUT and with the serdes interface circuit via digital signals. State changes in the digital signals are synchronized to a clock signal within the IC tester. The serdes interface circuit receives instructions from the IC tester via at least one of the digital signals and responds to the instructions by transmitting data to the DUT via the serdes bus using appropriate serdes protocol, by receiving and storing data transmitted by the DUT via the serdes bus, and by thereafter forwarding the stored data to the IC tester via at least one of the digital signals.

Test system for integrated circuits with serdes ports

Correlation between a waveform displayed on a waveform display device and the corresponding portion of a video image displayed on a monitor is achieved by brightening a portion of a video input signal from which the waveform and video image are produced. A horizontal sweep signal is compared with voltages representing the left and right edges of the waveform display device screen to determine the portion of the video input signal that is 'on-screen'. The on-screen signal is combined with a line select signal to produce a control signal. The control signal is used to level shift the video input signal to provide a 'bright-up' feature as part of the video image on the monitor, indicating the portion of the video image being displayed as a waveform on the screen of the waveform display device.

Correlation of a waveform to a video image

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Portland, OR, United States of America

James Kaylor Larson