Patent ID: 7215273

Claim:
A method for reconstructing and controlling the phase position of a sampling clock relative to an analog signal to be sampled, comprising the steps of: sampling a plurality of values of the analog signal with the sampling clock at different instants in time; determining a plurality of time gradients of the analog signal at different instants in time; reconstructing a signal curve of the analog signal in at least one subregion of a region of the analog signal defined by the sampled values and the determined gradients through use of at least some of the sampled values and at least some of the determined time gradients; determining a zero point of a first time derivative of the reconstructed signal curve; determining a phase position of the sampling clock relative to the analog signal based on a time distance of one of the sampled values from the time position of the determined zero point; and supplying the determined phase position to a control loop that adjusts the phase position of the sampling clock relative to the analog signal based on the determined phase position.