Abstract: The present invention discloses a System on Chip, which includes a power supply pin, a ground pin, an anti-static unit and an anti-reverse connection unit, wherein the anti-static unit is connected between the power supply pin and the ground pin through the anti-reverse connection unit, the power supply pin and the ground pin of the System on Chip are connected to an external power supply; wherein, when the System on Chip is in normal operation, the anti-static unit performs ESD protection of the power supply pin through the conducted anti-static unit; whereas when the external power supply is reversely connected between the power supply pin and the ground pin of the System on Chip, the anti-reverse connection unit is cut off to prevent the reversely connected external power supply from directly connecting anode with cathode of the external power supply through the anti-static unit.

Abstract: A power switch drive circuit with a built-in power supply capacitor, when the power switch (M1) reaches the turn-on threshold, it is discharged through the power supply capacitor (Cvcc) to turn on the power switch (M1), thereby saving the charge requirement on the power supply capacitor (Cvcc), and enabling a small-capacity power supply capacitor (Cvcc) to realize power switch (M1) driving. At the same time, the power supply capacitor (Cvcc) can be designed in an integrated circuit to improve reliability and reduce costs, therefore, it can solve the problem that the capacity of the power supply capacitor is too large to be able to be designed on the integrated circuit, which results in a large occupied space and an increased cost.

Abstract: A small capacitance compensation network circuit, the first switch module (201) and the second switch (202) module are alternately switched between a switched-off state and a switched-on state, so that the compensation capacitor C3 is charged by the capacitor C1; and the third switch module (203) and the fourth switch module (204) are alternately switched between the switched-off state and the switched-on state, so that the compensation capacitor C3 is discharged to charge the capacitor C2, by controlling the alternate switch-on of the first switch module (201) and the second switch module (202), the third switch module (203) and the fourth switch module (204) causes the deviation of the capacitor C1 and the capacitor C2 to be processed and obtain the error signal.