| 摘要 |
The invention relates to a method and apparatus for restoring at least one data signal (DATAIN) with the aid of a clock signal (CL). In the method at least two signal delay means (1,3) are arranged with time delay adjustable in time steps such that their time steps are given substantially the same responsiveness to at least one ambience factor, e.g. temperature. The first signal is delayed with the aid of a first one of the signal delay means. A first restored data signal (DATAOUT) is created by sensing the delayed first signal at given first times determined by the clock signal. The results of sensing at different sensing times are compared and the delay of the first signal by the first signal delay means is varied stepwise by varying the number of time steps in response to the comparison. The second signal delay means is used for relating a plurality of time steps to the clock signal period time. The magnitude of time steps in both the first and second signal delay means is controlled synchronously in response to the relating process to that the magnitude of a time step is in a given relationship to the clock signal period time. An apparatus in accordance with the invention inlcudes, apart from the signal delay means, first and second sensing, comparison and control means (2,4) connected to the signal delay means. |
