Circuit and method for calibrating the phase shift between a plurality of digitizers in a data acquisition system

The present invention concerns a circuit and a method for calibrating the phase shift between a plurality of digitizers in a data acquisition system. The analog-to-digital conversion circuit for high-frequency data acquisition system comprises a plurality of digitizers () capable of sampling and digitizing a high-frequency analog input signal (a; w), the sampling times of the different digitizers being phase-shifted, and a circuit () for calibrating the phase shift between a first digitizer and a second digitizer. The phase shift calibration circuit () determines a phase shift correction value (u) so as to minimize the difference between a sequence of digital values (r) determined by the first digitizer () and a sequence of corresponding digital values (u) determined by interpolating the digital values (s) supplied by the second digitizer (). The value u can be calculated according to the following equation: wherein p represents the sampling period, rrepresents the value supplied by the first digitizer () at the time i and sthe value supplied by the second digitizer () at the corresponding sampling time.