Pseudo-random bidirectional counter

Details Pseudo-random bidirectional counter Pseudo-random bidirectional counter

1976-05-17

1977-02-22

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92DE, 235 92R, 331 78, H03K 2330, H03B 2900

Patent

active

040093743

ABSTRACT:
A pseudo-random counter, comprising any conventional shift register having a plurality of flip-flop stages, affords counting capability in two directions, either left or right, by providing logic circuit means for generating from the flip-flop outputs a first repetitive logic bit stream which is shifted to the right in response to one gating signal and a second repetitive logic bit stream which is shifted to the left in response to another gating signal, with the two bit streams being mirror images of each other and applied to the register such that the binary output of the register after advancing the count by any number of clock pulses in the presence of one of the gating signals is the same as the binary output which would have been obtained by regressing the count by the same number of clock pulses in the presence of the other gating signal.

REFERENCES:
patent: 3691472 (1972-09-01), Bohman
patent: 3742381 (1973-06-01), Hurd
patent: 3885139 (1975-05-01), Hurd

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