Patent ID: 9257899
Filing Date: 2016-02-09
CPC Classification: H03L

Claim Text:
1. A charge pump circuit, comprising: an up-side current source, configured for providing a first current; a down-side current source, configured for providing a second current; a main switch set, an end of the main switch set connected with the up-side current source serially and another end of the main switch set connected with the down-side current source serially, the main switch set having a control end, the main switch set configured for controlling the first current to flow from the up-side current source to the control end according to a rising signal, controlling the second current to flow from the control end to the down-side current source according to a falling signal, and outputting a voltage of the control end; an assist switch set, an end of the assistant switch set electrically connected with the end of the main switch set and another end of the assistant switch set electrically connected with the another end of the main switch set, the assistant switch set having an assistant end, the assistant switch set configured for controlling the first current to flow from the up-side current source to the assistant end according to the inversely rising signal, and controlling the second current to flow from the assistant end to the down-side current source according to the inversely falling signal; a main voltage divider, coupled to the main switch set and configured for generating a voltage division to the control end when the charge pump circuit is activated, and stopping generating the voltage division to the control end after a predetermined time of activating the charge pump circuit; and an assistant voltage divider, coupled to the assistant switch set and generating the voltage division to the assistant end.