Wide-input-range comparator with common-mode feedback regulation

The invention relates to the technical field of sampling circuits, in particular to a wide-input-range comparator with common-mode feedback regulation, which can improve the input common-mode range and comprises a comparator module, a current source Iup1, a current source Iup2 and a power supply comparator, the current source Iup1 is connected with a switch SW1, a resistor R1 and a resistor R2 are connected in series, the current source Iup2 is connected with a switch SW2, a resistor R1 and a resistor R2 are connected in series, and the comparator module is connected with the power supply VDD. One ends of the two resistors R2 are connected with the two ends of the resistor Rsense respectively, the other ends of the two resistors R2 are connected with the current source IB1 and the current source IB2 respectively, the two input ends of the comparator module are connected with the switch SW1 and the switch SW2 respectively, the resistor Rsense is connected with the input end of the power supply comparator, and