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    • 2. 发明申请
    • Differential charge pump
    • 差动电荷泵
    • US20030034813A1
    • 2003-02-20
    • US10217824
    • 2002-08-12
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.
    • Mihai Adrian Tiberiu Sanduleanu
    • H03L007/06
    • H03L7/0805H03F3/3432H03F3/453H03F3/45874H03F3/45887H03F2203/45298H03F2203/45352H03L7/07H03L7/087H03L7/0896H03L7/14H03L2207/06
    • The present invention relates to a differential charge pump, in particular for use in a tuning system including a phase-locked loop, for generating currents, comprising a first input (INnull) and an inverse second input (INnull), in particular for receiving differential signals from a phase comparator, first current source means (Q1) for generating a first current (kIo) in accordance with the signal inputted into said first input (INnull), second current source means (Q2) for generating an inverse second current (kIo) in accordance with the signal inputted into said second input (INnull); and a first output (OUTnull) and a second output (OUTnull) for outputting said first and second currents, respectively. Further, the differential charge pump comprises a first controllable common mode current source means (14) for additionally feeding common mode current to said first output (OUTnull), a second controllable common mode current source means (16) for additionally feeding common mode current (IBIAS2) to said second output (OUTnull), and common mode controlling means (6) for controlling said first and second common mode current source means (14, 16) so as to make the common mode currents essentially equal to the currents (kIo) generated by said first and second current source means (Q1, Q2), respectively.
    • 差分电荷泵技术领域本发明涉及一种差分电荷泵,特别是用于包括用于产生电流的包括锁相环的调谐系统的差分电荷泵,包括第一输入(IN +)和反向第二输入(IN-),特别是用于接收 来自相位比较器的差分信号,用于根据输入到所述第一输入(IN +)的信号产生第一电流(kIo)的第一电流源装置(Q1),用于产生反向第二电流的第二电流源装置(Q2) 根据输入到所述第二输入(IN-)的信号; 以及用于分别输出所述第一和第二电流的第一输出(OUT +)和第二输出(OUT-)。 此外,差分电荷泵包括用于另外馈送共模电流到第一输出(OUT +)的第一可控共模电流源装置(14),用于另外馈送共模电流的第二可控共模电流源装置(16) IBIAS2)到所述第二输出(OUT-)和共模控制装置(6),用于控制所述第一和第二共模电流源装置(14,16),以使共模电流基本上等于电流(kIo )分别由所述第一和第二电流源装置(Q1,Q2)产生。