Abstract A multichannel pulse code modulation time division multiplex system samples the signals appearing in each of the channels substantially simultaneously at a predetermined rate and encodes the signal samples obtained from all of the channels substantially simultaneously with the aid of a clock pulse generator common to all channels, a repetitive staircase waveform generator common to all channels driven by the clock pulse generator, a separate pulse counter in each channel, a gate in each channel for supplying pulses from the clock pulse generator to the pulse counter, and comparison means in each channel to inhibit transmission through the gate whenever the staircase waveform exceeds the magnitude of the signal sample in the same channel.
In a pulse code modulAtion transmission system which includes a plurality of signal channels, means to sample the signal appearing in each of said channels substantially simultaneously at a predetermined rate and means to encode the signal samples obtained from all of said channels substantially simultaneously which comprises a repetitive staircase waveform generator common to all of said channels and means associated with each of said channels to count the steps in the staircase waveform provided by said generator until said staircase waveform exceeds the magnitude of the signal sample in the same channel.
Claim 2
Dependent Claim
94 words
In a pulse code modulAtion transmission system which includes a plurality of signal channels, means to sample the signal appearing in each of said channels substantially simultaneously at a predetermined rate and means to encode the signal samples obtained from all of said channels substantially simultaneously which comprises a repetitive staircase waveform generator common to all of said channels and means associated with each of said channels to count the steps in the staircase waveform provided by said generator until said staircase waveform exceeds the magnitude of the signal sample in the same channel.
Claim 3
Dependent Claim
24 words
A pulse code modulation transmission system in accordance with claim 1 in which said staircase waveform generator is repetitive at said predetermined sampling rate.
Claim 4
Dependent Claim
99 words
A pulse code modulation transmission system in accordance with claim 2 in which said counting means includes a clock pulse generator common to all of said channels connected to drive said staircase waveform generator at the rate of one step per clock pulse, a separate pulse counter in each of said channels, a gate in each of said channels supplying pulses from said clock pulse generator to said pulse counter, and comparison means in each of said channels to inhibit transmission through said gate whenever said staircase waveform exceeds the magnitude of the signal sample in the same channel.