Timing adjustment of clock signals in a digital circuit
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United States of America Patent
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Jan 31, 2006
Grant Date -
Mar 25, 2004
app pub date -
Sep 24, 2003
filing date -
Mar 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A digital system that performs a specified function by performing digital processing according to one or more clock signals is provided with a plurality of delay elements which are respectively inserted in a plurality of clock circuits that supply the clock signals in the digital system and each of which is composed of a circuit element that changes a delay time according to a value indicated by a control signal, and a plurality of holding circuits that hold a plurality of control signals to be given to the plurality of delay elements. In the plurality of holding circuits, a value of the control signals held by these holding circuits is changed by external devices according to a probabilistic search technique so that the digital system operates correctly in relation to operation timing.
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