Sampling pulse type trigger

The invention provides a sampling pulse type trigger comprising a first data signal input unit and a second data signal input unit, a clock signal input unit, a first signal output unit and a second signal output unit, a first NOR logic unit, a second NOR logic unit, a first charging/discharging unit, a second charging/discharging unit and a maintaining unit, wherein the first NOR logic unit is used for outputting a delay clock signal of a first gating under the control of a clock signal, a first signal and a second signal; the second NOR logic unit is used for outputting a delaying clock signal of a second gating under the control of the clock signal, the first signal and the second signal; the first charging/discharging unit is used for carrying out condition sampling on a first data signal when the clock signal and the clock signal of the first gating are high electrical levels; the second charging/discharging unit is used for carrying out the condition sampling on a second data signal when the clock signal and the clock signal of the second gating are the high electrical levels; and the maintaining unit is used for switching off an upper maintaining access or a lower maintaining access of the first signal. The trigger not only has a flexible edge property, but also reduces the power consumption.