Method and apparatus for zero skew routing from a fixed H trunk
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United States of America Patent
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Dec 4, 2001
Grant Date -
N/A
app pub date -
May 5, 1998
filing date -
May 5, 1998
priority date (Note) -
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Abstract
Provided is a technique for reducing skew in routing a clock signal in an integrated circuit device by prerouting an H trunk, dividing the H trunk into parts, and balancing delays in one of the parts by adding snaking wire. In a more particular aspect, the clock signal is prerouted as an H trunk, and the H trunk is divided into a left-top quadrant, a left-bottom quadrant, a right-top quadrant, and a right-bottom quadrant. The signal delays are balanced as between the two left quadrants by adding snaking wire, the signal delays are balanced between the two right quadrants by adding snaking wire, and the signal delays are balanced between the right half and the left half by adding snaking wire.
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