Positive-and-negative-voltage charge pump circuit, chip and communication terminal

A positive-and-negative-voltage charge pump circuit, comprising:

• a clock generation module, a positive-voltage charge pump module, a transient enhancement module and a negative-voltage charge pump module, wherein an output end of the clock generation module is connected to an input end of the positive-voltage charge pump module and an input end of the negative-voltage charge pump module, an output end of the positive-voltage charge pump module is connected to an input end of the transient enhancement module, an output end of the transient enhancement module is connected to an input power supply end of the negative-voltage charge pump module, and power supply ends of the clock generation module, the positive-voltage charge pump module and the transient enhancement module are all connected to a supply voltage;
• and
• the positive-voltage charge pump module generates a positive voltage according to a clock signal outputted by the clock generation module, the positive voltage and the supply voltage serve as input voltage sources to be sampled by the transient enhancement module and converted into currents for comparison, and a switchable input voltage is provided for the negative-voltage charge pump module according to a comparison result, such that the negative-voltage charge pump module generates a negative voltage according to the clock signal outputted by the clock generation module.