Switch circuit, sampling switch circuit and switch capacitor circuit

A switch capacitor circuit, comprising:

• a plurality of switches, respectively comprising a first terminal, wherein the first terminals of the switches respectively receive an input voltage, wherein the input voltages received by different one of the switches are from different input voltage sources;
• a switching module;
• a voltage adjusting capacitor, for receiving a charging current thereby charged to a first predetermined voltage, having a first terminal and a second terminal, wherein the first terminal of the voltage adjusting capacitor is coupled to a predetermined voltage source, and the second terminal is selectively coupled to at least one of the plurality of switches via the switching module in a conductive mode, wherein the first terminal of the capacitor is not coupled to the input voltage sources;
• wherein the switches comprise:
• a first switch, comprising a first terminal coupled to a first input voltage;
• and
• a second switch, comprising a first terminal coupled to a second input voltage lower than the first input voltage;
• wherein the second terminal of the voltage adjusting capacitor is coupled to the second switch, not coupled to the first switch in the conductive mode;
• wherein the switch capacitor circuit further comprises:
• a first capacitor;
• a second capacitor;
• a third switch, comprising a first terminal coupled to the first input voltage;
• a fourth switch, comprising a first terminal coupled to the second input voltage;
• and
• a common mode switching module;
• wherein the common mode switching module controls the first capacitor and the second capacitor to be coupled with each other and controls the second terminal of the voltage adjusting capacitor to be coupled to the common mode switching module, when the first capacitor and the second capacitor are conductive to a third input voltage via the common mode switching module.