Switch-body PMOS switch with switch-body dummies
    167.
    发明公开
    Switch-body PMOS switch with switch-body dummies 审中-公开
    开关体PMOS开关与开关主体假人

    公开(公告)号:EP2330741A3

    公开(公告)日:2014-09-17

    申请号:EP10193417.2

    申请日:2010-12-02

    申请人: NXP B.V.

    摘要: An analog sample-and-hold switch has parallel branches extending from an input node to an output node connected to a hold capacitor, each branch having a PMOS signal switch FET in series with a PMOS dummy FET. A sample clock controls on-off switching of the PMOS signal switch FETs, and an inverse of the sample clock controls a complementary on-off switching of the PMOS dummy FETs. A bias sequencer circuit biases the PMOS signal switch FETs and biases the PMOS dummy FETs, in a complementary manner, synchronous with their respective on-off states. The on-off switching of the PMOS dummy FETs injects charge cancelling a charge injection by the PMOS signal switch FETs, and injects glitches cancelling glitches injected by the PMOS signal switch FETs.