Signal amplitude sequenced time division multiplex communication system

Claim 1

IN A TIME DIVISION MULTIPLEX COMMUNICATION SYSTEM FOR TRANSMITTING AN ANALOG SIGNAL FROM AN INDIVIDUAL ORIGINATING POINT CORRESPONDING THEREWITH TO A PRESELECTED TERMINATING POINT CORRESPONDING THEREWTIN, SAID SYSTEM COMPRISING A SOURCE OF ANALOG SIGNAL COUPLED TO SAID ORIGINATING POINT, A PERIODIC SIGNAL SOURCE FOR PRODUCING A PERIODIC SIGNAL HAVINGA FUNDAMENTAL FREQUENCY WHICH IS GREATER THAN TWICE AS HIGH AS THE HIGHEST FREQUENCY WHICH IS GREATER SAID ANALOG SIGNAL TO BE TRANSMITTED, SAID PERIODIC SIGNAL SOURCE INCLUDING WAVEFROM MEANS FOR PRODUCING AS AN OUTPUT DURING EACH CYCLE OF SAID PERIODIC SIGNAL A PREDETERMINED SINGLE-VALUED FUNCTION WITH RESPECT TO TIME WHICH HAS AN AMPLITUDE RANGE WHICH IS AT LEAST AS GREAT AS THE MAXIMUM AMPLITUDE RANGE OF SAID ANALOG SIGNAL, A LOW-PASS FILTER HAVING A CUTOFF FREQUENCY WHICH IS GREATER THAN SAID HIGHEST FREQUENCY COMPONENT OF SAID ANALOG SIGNAL AND LESS THAN SAID FUNDAMENTAL FREQUENCY, FIRST COUPLING MEANS FOR APPLYING THE OUTPUT OF SAID FILTER TO SAID PRESELECTED TERMINATING POINT, SAMPLING MEANS COUPLED TO SAID ORIGINATING POINT AN SAID PERIODIC SIGNAL SOURCE FOR SAMPLING THE INSTANTANEOUS AMPLITUDE OF SAID ANALOG SIGNAL ONCE DURING EACH CYCLE OF SAID PERIODIC SIGNAL AND FOR DERIVING A PULSE WIDTH MODULATED PULSE DURING EACH CYCLE OF SAID PERIODIC SIGNAL WHICH HAS ITS LEADING EDGE OCCURRING AT A FIXED TIME WITH RESPECT OT THE BEGINNING OF EACH CYCLE OF SAID PERIODIC SIGNAL AND WHICH HAS ITS LAGGING EDGE OCCURRING WHEN A PREDETERMINED AMPLITUDE DIFFERENCE EXISTS BETWEEN THE SAMPLED ANALOG SIGNAL AND THE INSTANTANEOUS AMPLITUDE OF SAID SINGLE-VALUED FUNCTION, AND SECOND COUPLING MEANS FOR APPLYING THE PULSE WIDTH MODULATED PULSE DERIVED DURING EACH CYCLE OF SAID PERIODIC SIGNAL TO THE INPUT OF SAID LOW-PASS FILTER.