发明名称 |
CHARGE PUMP SURGE CURRENT REDUCTION |
摘要 |
Techniques for reducing surge current in charge pumps. In an exemplary embodiment, one or more switches coupling a terminal of a flying capacitor to a voltage supply are configured to have variable on-resistance. When the charge pump is configured to switch a gain mode from a lower gain to a higher gain, the one or more variable resistance switches are configured to have a decreasing resistance profile over time. In this manner, surge current drawn from the voltage supply at the outset of the gain switch may be limited, while the on-resistance during steady-state charging and discharging may be kept low. Similar techniques are provided to decrease the surge current from a bypass switch coupling the supply voltage to a positive output voltage of the charge pump. |
申请公布号 |
WO2012125766(A3) |
申请公布日期 |
2013.01.31 |
申请号 |
WO2012US29128 |
申请日期 |
2012.03.14 |
申请人 |
QUALCOMM INCORPORATED;QUAN, XIAOHONG;SRIVASTAVA, ANKIT;MIAO, GUOQING |
发明人 |
QUAN, XIAOHONG;SRIVASTAVA, ANKIT;MIAO, GUOQING |
分类号 |
H02M3/07 |
主分类号 |
H02M3/07 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|