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Pseudo-Random Bit Sequence Generator Circuit

2017-09-04 19:49  
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In this circuit, an additional exclusive-OR gate is connected after the modulo-2 feedback, with CI and R2 applying the supply turn-on ramp into the feedback loop. This provides sufficient transient signal so that the PRBS generator can self-start a power-up. A shift-register length of 10 is shown with feedback at stages 3 and 10, providing true and inverted maximal length sequence outputs. This technique applies an input directly to the feedback loop.
Pseudo-Random Bit Sequence Generator Circuit

Therefore, it`s considered more reliable than applying an RC configuration to the shift-register reset input to create a random turn-on state.



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