| 摘要 |
PROBLEM TO BE SOLVED: To provide a phase interpolation circuit that continuously keeps an optimum operating band irrespective of PVT variations.SOLUTION: The clock phase interpolation circuit for generating phase-interpolated interpolation clocks PI_CLK, PI_CLKX from a plurality of operation clocks CLK_0, CLK_90, CLK_180, CLK_270 different in phase includes: a phase interpolation processing circuit having band adjustment elements 15A, 15B, 16A, 16B therein and capable of changing set values of the band adjustment elements to perform a band adjustment; and a control circuit 20 for detecting a transition state of the interpolation clocks relative to a reference clock PLL_CLK, and on the basis of the detected transition state, controlling the set values of the band adjustment elements. |
