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    • 4. 发明申请
    • POINTER JITTER SUPPRESSION IN A DESYNCHRONIZER
    • 点火枪抑制剂在脱硫剂中的作用
    • WO1993016535A1
    • 1993-08-19
    • PCT/FI1993000045
    • 1993-02-12
    • NOKIA TELECOMMUNICATIONS OYURALA, Reino
    • NOKIA TELECOMMUNICATIONS OY
    • H04J03/06
    • H04Q11/0478H04J3/076H04J2203/0089
    • The invention relates to an arrangement for suppressing pointer justification jitter in a desynchronizer in a digital transmission system, the desynchronizer comprising a data buffer (1); a data buffer write address counter (2) controlled by a write clock (CLK1); a data buffer read address counter (3) controlled by a read clock (CLK2); and a phase-locked loop comprising a phase comparator (4), a loop filter (A1) and a voltage-controlled oscillator (5) for adjusting said read clock on the basis of the phase difference between the read and write clocks. According to the invention, the arrangement comprises means (A2, 71, 81) for positively controlling the phase-locked loop so as to limit, in synchronization with the time of occurrence of each pointer justification, the maximum amplitude of the phase jitter induced in an output signal (DATA OUT) of the desynchronizer by said pointer justification.
    • 本发明涉及一种用于抑制数字传输系统中的去同步器中的指针对齐抖动的装置,所述去同步器包括数据缓冲器(1); 由写入时钟(CLK1)控制的数据缓冲器写入地址计数器(2); 由读时钟(CLK2)控制的数据缓冲器读地址计数器(3); 以及包括相位比较器(4),环路滤波器(A1)和压控振荡器(5)的锁相环,用于根据读和写时钟之间的相位差来调整所述读时钟。 根据本发明,该装置包括用于积极地控制锁相环的装置(A2,71,81),以便与每个指针对齐的发生时间同步地限制相位抖动引起的最大幅度 通过所述指针对齐的去同步器的输出信号(DATA OUT)。