Calibration board for calibrating signal delays of test channels in an automatic test equipment and timing calibration method thereof
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United States of America Patent
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Dec 12, 2017
Grant Date -
May 5, 2016
app pub date -
Oct 30, 2015
filing date -
Oct 31, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A calibration board and a timing calibration method thereof are provided. The calibration board for calibrating signal delays of test channels in an automatic test equipment is pluggably disposed in the automatic test equipment and includes calibration groups, a first common node, and a switching module. Each calibration group includes a second common node and conductive pads electrically connecting to the second common node. Each conductive pad selectively and electrically connects to one test channel. The switching module electrically connects to the first common node and each second common node. When a first delay calibration procedure is performed, the connection between the first common node and each second common node is disabled. When a second delay calibration procedure is performed, the connection between the first common node and each second common node is built.
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