Digital word generator

Details Digital word generator Digital word generator

1986-04-15

1988-03-22

Fleming, Michael R.

Excavating

371 25, G01R 3128

Patent

active

047333952

ABSTRACT:
For imitating periodic signals occurring in digital transmission systems during some operating conditions in view of the multiplex structure a word generator is proposed which includes a read-only memory from which during a test signal cycle only 4116 permutations are successively read out of a total of 65,536 possible word sizes and permutations of e.g. a 16-bit word. The remaining 61,420 permutations are generated by shifting bit-by-bit the entire packet of continuous signals so that in case of a fixed 16 bit pattern the packet starts at a different bit position during each successive cycle and after 16 cycles all 16 bit positions occur as begin state. The shift is caused by a framing bit sequence which determines the test signal cycle and whose length is aliquant to n=16.

REFERENCES:
patent: 4442519 (1984-04-01), Jones
patent: 4493045 (1985-01-01), Hughues
patent: 4555663 (1985-11-01), Shimizu
patent: 4586181 (1986-04-01), Shimizu
patent: 4598245 (1986-07-01), Groves

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