公开(公告)号：US5937021A

公开(公告)日：1999-08-10

申请号：US848742

申请日：1997-05-01

申请人： Nathalie Pereira ,  Bertrand DeBray

发明人： Nathalie Pereira ,  Bertrand DeBray

IPC分类号： H03L7/099 ,  H04J3/07 ,  H03D3/24

CPC分类号： H04J3/073 ,  H03L7/0992

摘要： The invention relates to a phase-locked loop delivering a recovered clock signal from a reference clock signal F.sub.ref in which some transitions are missing. The loop includes a first divide-by-M frequency divider receiving the clock F.sub.ref and delivering a signal of frequency F.sub.ref /M; a phase comparator providing a phase error signal from the signal of frequency F.sub.ref /M, and the output signal from a second divide-by-M frequency divider; a divide-by-K frequency divider providing a signal of frequency F.sub.k from a local oscillator signal of frequency F.sub.oL receiving the phase error signal as a control signal; an adder-counter of the division ratio p/q receiving the local oscillator signal of frequency F.sub.oL and delivering a signal of frequency F.sub.o equal to F.sub.oL *p/q; a mixer delivering a signal of frequency F.sub.n equal to F.sub.o -F.sub.k on the basis of signal of frequency F.sub.k and the signal of frequency F.sub.o ; and a divide-by-N frequency divider synchronized by F.sub.oL, receiving the signal of frequency F.sub.n, and delivering a recovered clock to the second divide-by-M frequency divider.

摘要翻译： 本发明涉及一种锁相环路，其从其中缺少一些转换的参考时钟信号Fref传送恢复的时钟信号。 该环路包括接收时钟Fref并传送频率Fref / M的信号的第一分频M分频器; 相位比较器，从频率Fref / M的信号和来自第二除M分频器的输出信号提供相位误差信号; K分频器从接收相位误差信号的频率FoL的本地振荡器信号作为控制信号提供频率Fk的信号; 接收频率FoL的本地振荡器信号的分频比p / q的加法器 - 计数器，并且传送等于FoL * p / q的频率Fo的信号; 根据频率Fk的信号和频率Fo的信号，输出等于Fo-Fk的频率Fn的信号的混合器; 以及由FoL同步的除以N分频器，接收频率Fn的信号，并将恢复的时钟传送到第二分频分频器。

公开(公告)号：US06442177B1

公开(公告)日：2002-08-27

申请号：US09155424

申请日：1998-09-29

申请人： Bertrand DeBray

发明人： Bertrand DeBray

IPC分类号： H04J307

CPC分类号： H04J3/12 ,  H04J3/07

摘要： A method of inserting a service channel in frames that are plesiochronous relative to the service channel, the method including the steps of transmitting a block clock between a transmitter and a receiver of the frame, and reserving at the transmitter at least one location in the frames for the purpose of conveying the service channel data. The method further includes the steps of: inserting blocks (B) of the service channel into the reserved location causing each of the blocks (B) to be preceded by a predetermined number n1 of identical bits (D) referred to as “start” bits, and to do so in compliance with the following rules: in the event of there being no need to pad out the remainder of the location, repeating the method from the inserting step for a new block (B); in the event of it being necessary to pad out the remainder of the location, causing each of the blocks (B) to be followed by a number n2 of identical bits (F) referred to as “stop” bits, the “stop” bits (F) being different from the start bits (D), and repeating the method from the inserting step for a new block (B); and at the receiver: detecting the regular arrival of the start bits (D) or the regular arrival of the start bits (D) preceded by the stop bits (F), so as to be able to decide that the blocks (B) are present in the reserved locations and to extract the blocks (B) from the reserved locations.

摘要翻译： 一种将业务信道插入到相对于服务信道相位同步的帧中的方法，所述方法包括以下步骤：在所述帧的发射机和接收机之间传输块时钟，并且在所述发射机处保留所述帧中的至少一个位置 用于传送服务频道数据。 该方法还包括以下步骤：将服务信道的块（B）插入保留位置，使得块（B）中的每一个前面加上被称为“起始”位的相同位（D）的预定数量n1 ，并按照以下规则执行：在不需要填补剩余部分的情况下，从新块（B）的插入步骤重复该方法; 在需要填补该位置的剩余部分的情况下，使得每个块（B）后面跟有被称为“停止”位的相同位（F）的数目n2，“停止”位 （F）与起始位（D）不同，并从新块（B）的插入步骤重复该方法; 并且在接收机处：检测起始比特（D）的定期到达或开始比特（D）的正常到达之前的停止比特（F），以便能够确定块（B）是 存在于预留位置并从预留位置提取块（B）。