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    Charge pump circuit and method for phase locked loop
    42.
    发明授权
    Charge pump circuit and method for phase locked loop 有权
    电荷泵电路和锁相环路方法

    公开(公告)号：US07777541B1

    公开(公告)日：2010-08-17

    申请号：US11701215

    申请日：2007-02-01

    申请人： Galen E. Stansell ,  Timothy Wright

    发明人： Galen E. Stansell ,  Timothy Wright

    IPC分类号： H03L7/06

    CPC分类号： H03L7/0891

    摘要： A charge pump circuit can include a pump-up circuit having a first disable switch coupled between a pump-up output node and a first power supply node that is enabled and then disabled in response to a source current path between the pump-up node and a second power supply node being disabled, and a source off switch coupled in series with the first disable switch that is enabled in response to the source current path being disabled. The charge pump circuit can also include a pump-down circuit having a second disable switch coupled between a pump-down output node and the second power supply node that is enabled and then disabled in response to a sink current path between the pump-down node and a first power supply node being disabled. A sink off switch can be coupled in series with the second disable switch that is enabled in response to the sink current path being disabled.

    摘要翻译： 电荷泵电路可以包括泵浦电路，其具有耦合在泵浦输出节点和第一电源节点之间的第一禁用开关，其被启用，然后响应于泵浦节点和 被禁用的第二电源节点以及与所述第一禁用开关串联耦合的源关闭开关，所述第一禁用开关响应于所述源电流路径被禁用而被启用。 电荷泵电路还可以包括抽水电路，其具有耦合在降压输出节点和第二电源节点之间的第二禁用开关，所述第二禁用开关响应于所述抽水节点 并且第一电源节点被禁用。 汇流开关可以与响应于吸收电流路径被禁用而被使能的第二禁用开关串联耦合。