Comparison unit of rapid capacitor

The utility model discloses a comparison unit of a rapid capacitor. The comparison unit is characterized by comprising a charging module, a comparison module and a judgment output module, wherein the charging module comprises a first capacitor and a second capacitor which are connected in series, and the first capacitor and the second capacitor are connected in parallel with an inverter after series connection; an input end of the inverter is connected with a clock signal, and the connection point of the first and second capacitors is utilized as a comparison output end of the charging module; the comparison module comprises a first switch and a second switch which are connected in series and are controlled by the clock signal so as to be switched and conducted, the connection point of the first and second switches is connected with the comparison output end, and the other end of the first switch is connected with a partial voltage end having the voltage of VDD/2; and the judgment output module is provided wi