Method and device for regenerating by maxima detection, a clock signal punctuating the transmission of received digitized signals

A device for synchronizing a local clock with a clock signal marking transmission of multilevel signals representing digitized and coded data received on a transmission channel, comprising:

• an amplifier for changing an amplitude of the signals;
• a circuit for sampling and digitizing the signals during time intervals of the signals with reference to clock signals of the local clock;
• a circuit for detecting an increase in absolute value of the signals;
• a circuit, coupled to the circuit for detecting an increase in absolute value, for locating vertices of the signals by detecting times when the derivative of the signals becomes equal to zero after detection of an increase in absolute value of the signals by the circuit for detecting an increase of absolute value of the signals, and the circuit for locating vertices forming, during each time interval, a difference configuration from amplitude differences between samples taken successively from the signals during the time interval and selecting difference configurations when the derivative of the signals goes through a zero value after detecting an increase in absolute value of the signals;
• and
• comparison elements which compare each difference configuration obtained with a list of standard difference configurations and apply to one of frequency or phase of the clock signals of the local clock a predetermined correction associated with each standard configuration of the list of standard difference configurations.

A device for synchronizing a local clock with a clock signal marking transmission of multilevel signals representing digitized and coded data received on a transmission channel, comprising:

• an amplifier for changing an amplitude of the signals;
• a circuit for sampling and digitizing the signals during time intervals of the signals with reference to clock signals of the local clock;
• a circuit for detecting an increase in absolute value of signals;
• a circuit, coupled to the circuit for detecting an increase in absolute value, for locating vertices of the signals by detecting times when the derivative of the signals becomes equal to zero, after a detection of an increase in absolute value of the signals by the circuit for detecting an increase in absolute value;
• and
• a circuit, responsive to the located vertices, for synchronizing the clock signals of the local clock.