Patent ID: 9438104
Filing Date: 2016-09-06
CPC Classification: H02M,H03F

Claim Text:
1. A fast startup charge pump circuit, comprising: a charge pump; and an output stage; wherein the load of the charge pump, during the period of pre-charging time, that is, during the short period of time when the charge pump starts-up, switch (Spre) and switch (Spreb) are set as: once the charge pump is negative charge pump, the switch (Spre) is ON (having low-impedance), the switch (Spreb) is OFF (having high-impedance); once the charge pump is positive charge pump, the switch (Spre) is OFF (having high-impedance), the switch (Spreb) is ON (having low-impedance); once the pre-charging is over, the switch (Sper) and the switch (Spreb) are in the position that opposite to the state in the period of pre-charging time.