Pseudo-random code generator

Details Pseudo-random code generator Pseudo-random code generator

1974-09-30

1976-03-23

Dildine, Jr., R. Stephen

Registers

Transfer mechanism

Traveling pawl

331 78, G06f 102, H03k 382

Patent

active

039462153

ABSTRACT:
A pseudo-random bit generator forms a portion of the pseudo-random code generator, and provides square wave output bits over a defined frequency spectrum on a plurality of parallel output lines. The bits present on a selected number of output lines in sequence define a binary number, which is compared with an accumulated count present in a counter driven by a clock running at a predetermined frequency. A correct comparison resets the counter, shifts the pseudo-random bit generator, and shifts a past-history shift register which contains a portion of the output of the pseudo-random code generator. The output from the past-history shift register, and the square wave output bits on certain other parallel output lines from the random bit generator are applied as inputs to respective logic probability circuits. The logic probability circuits are connected to an output logic circuit, the output of which is the pseudo-random code signal, a series of square waves occurring pseudo-randomly over a frequency spectrum which is adjustable by altering the parameters of the various logic probability circuits.

REFERENCES:
patent: 3746847 (1973-07-01), Maritsas
patent: 3811038 (1974-05-01), Reddaway

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