公开(公告)号：US20040056690A1

公开(公告)日：2004-03-25

申请号：US10662180

申请日：2003-09-12

Applicant: STMicroelectronics S.A.

Inventor： Roland Marbot ,  Franck Hellard

IPC: H03D003/00

CPC classification number: H03K5/26 ,  H03K5/133 ,  H03K5/135 ,  H03K2005/00058 ,  H03L7/0812 ,  H04L7/0338

Abstract: A device for transforming a periodic input signal into an output signal of distinct frequency, comprising two adjustable delay means receiving the input signal, a multiplexer selecting the output signal of one or the other of the delay means, control means for, according to whether the output signal frequency must be smaller or greater than the input signal frequency, increasing or decreasing at the rate of the input signal, or at a multiple of this rate, the delay of the selected delay means, and controlling a minimum or maximum delay for the delay means which has not been selected, and a phase comparator adapted to changing the multiplexer selection when the transitions of the signals output by the delay means corresponding to a same transition of the input signal are offset by a duration greater than or equal to one period of the input signal.

Abstract translation: 一种用于将周期性输入信号变换为不同频率的输出信号的装置，包括接收输入信号的两个可调延迟装置，选择延迟装置中的一个或另一个的输出信号的多路复用器，根据是否 输出信号频率必须小于或大于输入信号频率，以输入信号的速率增加或减小，或以该速率的倍数，所选择的延迟装置的延迟，并且控制最小或最大延迟 延迟装置，以及相位比较器，适于在延迟装置输出的对应于输入信号的相同转变的信号的转变偏移持续时间大于或等于一个周期的情况下改变多路复用器选择 的输入信号。