Regenerative repeater for multivalued pcm system

Claim 2

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising m comparator means having m referencE amplitude levels, wherein 2m 1<n 2m, one of said comparator means including a comparator for comparing an input signal with a reference signal in amplitude level and producing an output signal in accordance with the amplitude level relationship of said input and reference signals; input means for supplying an input signal having a determined amplitude level and including noise to said comparator means; and outlet means connected to said comparator means for providing an output signal having said determined amplitude level and free of noise.

Claim 3

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising a signal holding circuit for storing an input signal at constant amplitude for a determined time; input means for supplying an input signal having a determined amplitude level and including noise to said signal holding circuit; clock pulse generating means for producing a plurality of clock pulses having a repetition rate equal to that of said input signal and clock pulses having a repetition rate equal to m+1 times the repetition rate of said input signal, wherein 2m 1< n 2m m being a positive integer; a comparison signal circuit coupled to said clock pulse generating means for producing a plurality of quantized signals within a predetermined level, each of said quantized signals comprising a comparison signal having an amplitude level determined by a clock pulse having a repetition rate which is m+1 times the repetition rate of said input signal, said comparison signal circuit initially producing a comparison signal of determined constant amplitude level; a comparator having an input coupled to said signal holding circuit and to said comparison signal circuit for comparing the input signal stored in said signal holding circuit and a comparison signal produced by said comparison signal circuit in amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, said comparator having an output coupled to said comparison signal circuit for supplying the output signal of said comparator to said comparison signal circuit to control the production by said comparison signal circuit of a comparison signal having an amplitude level which is nearest that of said input signal in magnitude, said comparator comparing said input signal and a comparison signal m times for a single input signal under the control of the clock pulses; and output means connected to said comparison signal circuit for providing an output signal having said determined amplitude level and free of noise.

Claim 4

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising a signal holding circuit for storing an input signal at constant amplitude for a determined time; input means for supplying an input signal having a determined amplitude level and including noise to said signal holding circuit; clock pulse generating means for producing a plurality of clock pulses having a repetition rate equal to that of said input signal and clock pulses having a repetition rate equal to m+1 times the repetition rate of said input signal, wherein 2m 1< n 2m m being a positive integer; a comparison signal circuit coupled to said clock pulse generating means for producing a plurality of quantized signals within a predetermined level, each of said quantized signals comprising a comparison signal having an amplitude level determined by a clock pulse having a repetition rate which is m+1 times the repetition rate of said input signal, said comparison signal circuit initially producing a comparison signal of determined constant amplitude level; a comparator having an input coupled to said signal holding circuit and to said comparison signal circuit for comparing the input signal stored in said signal holding circuit and a comparison signal produced by said comparison signal circuit in amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, said comparator having an output coupled to said comparison signal circuit for supplying the output signal of said comparator to said comparison signal circuit to control the production by said comparison signal circuit of a comparison signal having an amplitude level which is nearest that of said input signal in magnitude, said comparator comparing said input signal and a comparison signal m times for a single input signal under the control of the clock pulses; and output means connected to said comparison signal circuit for providing an output signal having said determined amplitude level and free of noise.

Claim 5

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n 2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the outPut signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch; and output means coupled in common to the comparator of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise.

Claim 6

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n 2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the outPut signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch; and output means coupled in common to the comparator of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise.

Claim 7

A regenerative repeater as claimed in claim 3, wherein the comparison signal with which the input signal is compared in the comparator of each of said circuit branches has an amplitude level which is different from those of the others.

Claim 8

A regenerative repeater as claimed in claim 3, wherein said output means comprises an adding circuit having a plurality of inputs each coupled to the comparator of a corresponding one of said circuit branches and an output providing said output signal, and delay means interposed between selected ones of said comparators and the corresponding inputs of said adding circuit.

Claim 9

A regenerative repeater as claimed in claim 3, wherein the difference circuit means of each of said circuit branches other than said first comprises a difference amplifier for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch and doubling the amplitude level of said difference.

Claim 10

A regenerative repeater as claimed in claim 3, wherein each of said circuit branches further comprises a signal holding circuit for storing the input signal supplied to the comparator of the corresponding circuit branch and to the difference circuit means of the next-succeeding circuit branch, the signal holding circuit of the first circuit branch being connected between said signal biasing circuit and the comparator of said first circuit branch and the signal holding circuit of each of the other circuit branches being connected between the difference circuit means and the comparator of the corresponding circuit branch.

Claim 11

A regenerative repeater as claimed in claim 3, wherein each of said circuit branches other than the first further comprises delay means connected in an input of the difference circuit means of the corresponding circuit branch for supplying the input signal simultaneously with the output signal of the comparator of the next-preceding circuit branch.

Claim 12

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n<2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch, the comparison signal with which the input signal is compared in the comparator of each of said circuit branches having twice the amplitude level of the comparison signal of the next-preceding circuit branch; and output means coupled in common to the comparatOr of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise.

Claim 13

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n<2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch, the comparison signal with which the input signal is compared in the comparator of each of said circuit branches having twice the amplitude level of the comparison signal of the next-preceding circuit branch; and output means coupled in common to the comparatOr of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise.

Claim 14

A regenerative repeater as claimed in claim 9, wherein said output means comprises an adding circuit having a plurality of inputs each coupled to the comparator of a corresponding one of said circuit branches and an output providing said output signal, and delay means interposed between selected ones of said comparators and the corresponding inputs of said adding circuit, the difference circuit means of each of said circuit branches other than said first comprises a difference amplifier for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch and doubling the amplitude level of said difference, and each of said circuit branches further comprises a signal holding circuit for storing the input signal supplied to the comparator of the corresponding circuit branch and to the difference circuit means of the next-succeeding circuit branch, the signal holding circuit of the first circuit branch being connected between said signal biasing circuit and the comparator of said first circuit branch and the signal holding circuit of each of the other circuit branches being connected between the difference circuit means and the comparator of the corresponding circuit branch.

Claim 15

A regenerative repeater as claimed in claim 4, wherein each of said circuit branches other than the first further comprises delay means connected in an input of the difference circuit means of the corresponding circuit branch for supplying the input signal simultaneously with the output signal of the comparator of the next-preceding circuit branch.

Claim 18

A method as claimed in claim 12, wherein the comparison signal of each of the circuit branches has an amplitude level which is different from those of the others.

Claim 19

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n<2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing Circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch; and output means coupled in common to the comparator of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise, said output means comprising an adding circuit having a plurality of inputs each coupled to the comparator of a corresponding one of said circuit branches and an output providing said output signal, and attenuating means connected in each input of said adding circuit other than the first for attenuating signals supplied to said adding circuit by 1/2 x, where x is an integer which is 1 in the second circuit branch and increases by 1 in each succeeding circuit branch.

Claim 20

A regenerative repeater for a multivalued PCM system which transmits a multinary code having n signal amplitude levels, said regenerative repeater comprising input means for supplying an input signal having a determined amplitude level and including noise; a signal biasing circuit connected to said input means for applying a constant amplitude level bias to said input signal; m circuit branches connected to said signal biasing circuit, wherein 2m 1<n<2m, each of said circuit branches comprising a comparator for comparing an input signal with a comparison signal having a determined amplitude level and producing an output signal in accordance with the amplitude relationship of said input and comparison signals, the input signal to the comparator of the first of said circuit branches being the input signal supplied by said input means and biased by said signal biasing Circuit, and each of said circuit branches other than said first comprising difference circuit means for determining the difference between the input signal supplied to the comparator of the next-preceding circuit branch and the output signal of the comparator of the next-preceding circuit branch, each of said difference circuit means having an output connected to the comparator of the corresponding circuit branch; and output means coupled in common to the comparator of each of said circuit branches for providing an output signal having said determined amplitude level and free of noise, said output means comprising an adding circuit having a plurality of inputs each coupled to the comparator of a corresponding one of said circuit branches and an output providing said output signal, and attenuating means connected in each input of said adding circuit other than the first for attenuating signals supplied to said adding circuit by 1/2 x, where x is an integer which is 1 in the second circuit branch and increases by 1 in each succeeding circuit branch.