Numerical-field clock recovery generating device

The utility model discloses a numerical-field clock recovery generating device. The numerical-field clock recovery generating device comprises an input reference clock sampling unit, a counter unit, a state machine unit and a recovery clock outputting unit. The input reference clock sampling unit conducts sampling on an input reference clock by using a high-frequency calibration clock, obtains a logic level of the current input reference clock, and outputs the logic level to the counter unit. The counter unit conducts counting on the current input reference clock by using the high-frequency calibration clock under the condition that the logic level of the current input reference clock does not change. The state machine unit conducts counting on the high-frequency calibration clock, conducts comparison on a threshold which is determined according to the input reference clock, the high-frequency calibration clock and preset frequency multiplication coefficients at the same time, and outputs control instructions to the recovery clock outputting unit to output a recovery clock.