Method for demodulating phase of signal carrying information in microchip card, involves sampling signal to be demodulated at frequency corresponding to natural number of samples, and another number, where numbers are prime numbers

摘要

The method involves sampling signal to be demodulated at frequency corresponding to a natural number of successive samples taken into account for determining a phase of the signal, and corresponding to another natural number, where the former natural number and the latter natural number are relative prime numbers. Each sample provides a sign of the signal to be demodulated with respect to a reference level representing median value of the signal that carries information. An independent claim is also included for a phase demodulator.