APPARATUS FOR DETECTING AND DISCRIMINATION OF PHASE HOPES IN A PERIODIC SIGNAL AND APPLICATION TO A TELEPHONE TONE SIGNAL WITH PHASE INVERSIONS.

摘要

According to the invention, the apparatus comprises, in a cascade, between an input terminal 1 and an output terminal 2, a frequency converter 3 which transforms the frequency spectrum of the input signal E (T) containing an array. FREQUENCY F IN A CONTINUOUS BAND SPECTRUM WHERE FREQUENCY IS CENTERED ON F, A SWITCH4, A RESONATOR5 AT FREQUENCY F WITH F, AND A PHASEMETER6 WITH MEANS OF DETECTION AND DISCRIMINATION. ALL OF THESE ELEMENTS ARE CONTROLLED BY A SEQUENCER7 WHICH ALLOWS, AT EACH PERIOD AS: ATT, THE PHASE DETECTION AND DISCRIMINATION OF EACH PHASE JUMP OF PREDETERMINED PH VALUE PRESENT IN THE FREQUENCY INPUT SIGNAL F. / P