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    • 2. 发明公开
    • 위상-스위칭 듀얼 모듈러스 프리스케일러 및 주파수 합성기
    • 相位切换双模块预分频器
    • KR1020060090695A
    • 2006-08-14
    • KR1020067006374
    • 2004-09-28
    • 에스티 에릭슨 에스에이 엔 리퀴데이션
    • 리나에르츠도미니쿠스엠더블유파블로빅네나드미스트리케탄
    • H03L7/16H03L7/193H03K23/66
    • H03K23/667H03K23/662H03L7/193
    • A phase-switching dual modulus prescaler having a dual modulus divider is provided. Said divider comprises a first and second divide-by-2 circuit (A;B), wherein said second divide-by-2 circuit (B) is coupled to the output of said first divide-by-2 circuit (A) and at least said second divide-by-two circuit (B) comprises a four phase output each separated by 90°. A phase selection unit (PSU) is provided for selecting one of the four phase outputs (Ip, I n, Qp, Qn; INi, INni, INq, Innq) of the second divide-by-2 circuit (B). Moreover, a phase control unit is provided for providing control signal (Cl, NC0; C2, NC2; C3, NC3) to the phase selection unit, wherein the phase selection unit (PSU) performs the selection of the four phase outputs(Ip, In, Qp, Qn; INi, INni, INq, Innq) according to the control signals (C0, NC0; C1, NC1; C2, NC2). Said phase selection unit (PSU) is implemented based on direct logic. The implementation of the phase selection unit based on direct logic enables a higher speed and saves area on the chip.
    • 提供了具有双模数分频器的相位切换双模预分频器。 所述分频器包括第一和第二除以2电路(A; B),其中所述第二分频电路(B)耦合到所述第一分频电路(A)的输出端,并且在 至少所述第二分频电路(B)包括每相分开90°的四相输出。 提供相位选择单元(PSU),用于选择第二分频电路(B)的四个相位输出(Ip,I n,Qp,Qn; INi,INni,INq,Innq)中的一个。 此外,相位控制单元被提供用于向相位选择单元提供控制信号(C1,NC0; C2,NC2; C3,NC3),其中相位选择单元(PSU)执行四相输出(Ip, 根据控制信号(C0,NC0; C1,NC1; C2,NC2),输入,Qp,Qn,INi,INni,INq,Innq)。 所述相位选择单元(PSU)是基于直接逻辑实现的。 基于直接逻辑的相位选择单元的实现能够实现更高的速度并节省芯片上的面积。