Integrated circuit
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United States of America Patent
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Dec 6, 2016
Grant Date -
Nov 26, 2015
app pub date -
May 20, 2015
filing date -
May 22, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
An integrated circuit includes a main clock tree, a reference clock trunk, a reference clock buffer and a calibration circuit. The main clock tree transmits a main operation clock to an internal node via serially-coupled buffers to form a local clock at an internal node. The reference clock buffer transmits a main reference clock via the reference clock trunk to form a reference clock at a terminal node. The calibration circuit compares phases of the local clock and the reference clock to accordingly generate a control signal, so the main clock tree can adjust phase of the local clock according to the control signal.
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