| 摘要 |
PROBLEM TO BE SOLVED: To realize a phase adjustment circuit capable of maintaining high linearity even when an operation frequency is switched.SOLUTION: A clock phase adjustment circuit for adjusting a phase of a fetch clock for fetching an input data signal by a fetch clock of a frequency CLKO N times the frequency of a reference clock CLKI includes: a code conversion circuit 21 for converting a fetch phase adjustment code indicating a phase shift quantity of a fetched input data signal into a reference clock phase adjustment code in accordance with a conversion table; a reference phase adjustment circuit 22 for adjusting the phase of the reference clock accordingly to the phase shift quantity by mixing the reference clock and the reference clock phase adjustment code; and a frequency conversion circuit 23 for converting an adjusted clock into a fetching clock with a frequency of N times. |
