Dual encoder for pcm

Claim 1

A SUBSTANTIALLY CROSSTALK-FREE PULSE CODE MODULATION ENCODING SYSTEM FOR CONVERTING A SUCCESSION OF SIGNAL AMPLITUDE SAMPLES INTO A CORRESPONDING SUCCESSION OF CODED SEQUENCES OF MARKS AND SPACES, THE MARKS AND SPACES OF EACH CODED SEQUENCE OCCUPYING A PREDETERMINED NUMBER OF CONSECUTIVE TIME SLOTS, WHICH COMPRISES A PAIR OF INPUT CHANNELS CARRYING RESPECTIVELY ALTERNATE ONES OF A SUCCESSION OF SIGNAL AMPLITUDE SAMPLES, A SOURCE OF A CONTROL PULSE WHICH IS GENERATED BETWEEN THE OCCURENCE OF EACH OF SAID CODED SEQUENCES OF MARKS AND SPACES, A FIRST WEIGHTED NETWORK FOR WEIGHING ONLY THOSE SIGNAL AMPLITUDE SAMPLES APPEARING IN ONE OF SAID INPUT CHANNELS, CHANNELS, LOGIC CIRCUITRY COMMON TO BOTH OF SAID WEIGHTED NETWORKS FOR CONTROLLING THE SEQUENTIAL OPERATION OF SAID WEIGHTED NETWORKS SO THAT UNDER THE CONTROL OF SAID COMMON LOGIC CIRCUITRY EACH OF SAID WEIGHTED NETWORKS FUNCTIONS AS AN ENCODER, A COMMON OUTPUT CHANNEL, AND A TRANSFER GATE RESPONSIVE TO SAID CONTROL PULSE WHICH IS GENERATED BETWEEN THE OCCURRENCE OF EACH CODED SEQUENCE OF MARKS AND SPACES FOR CONNECTING SAID FIRST AND SECOND WEIGHTED NETWORKS ALTERNATELY TO SAID COMMON OUTPUT CHANNEL IN SYNCHRONISM WITH THE SEQUENCE OF SAID AMPLITUDE SAMPLES IN SAID INPUT CHANNELS.