US 12,191,765 B2
Positive-and-negative-voltage charge pump circuit, chip and communication terminal
Yongshou Wang, Shanghai (CN); Cheng Chen, Shanghai (CN); Chunling Li, Shanghai (CN); and Sheng Lin, Shanghai (CN)
Assigned to SHANGHAI VANCHIP TECHNOLOGIES CO., LTD., Shanghai (CN)
Filed by SHANGHAI VANCHIP TECHNOLOGIES CO., LTD., Shanghai (CN)
Filed on May 16, 2023, as Appl. No. 18/318,026.
Application 18/318,026 is a continuation of application No. PCT/CN2021/130586, filed on Nov. 15, 2021.
Prior Publication US 2023/0291309 A1, Sep. 14, 2023
Int. Cl. H02M 3/07 (2006.01)
CPC H02M 3/07 (2013.01) [H02M 3/071 (2021.05)] 15 Claims
OG exemplary drawing
 
1. 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.