METHOD AND DEVICE WHICH GENERATE QUADRATURE CLOCK

摘要

PROBLEM TO BE SOLVED: To perform adjustment so that phase of a clock of a certain region of an integrated circuit may become the same phase as that of a clock of other region.

SOLUTION: In a method and a device which generate a quadrature clock, a quadrature clock generating device contains a clock generator which provides a double clock which has a double frequency of that of a received reference clock. A frequency divider circuit is combined so that an alignment signal may be offered which has a frequency of a half of the double clock. Following the alignment signal, a first clock and a second clock are recovered from the double clock by a recovery circuit. The first clock and the second clock have a phase difference of substantially 90°.

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