PSEUDO_RANDOM_BIT_SEQUENCE_GENERATOR

Published:2009/6/23 2:09:00 Author:Jessie | From:SeekIC

In this circuit, an additional exclusive-OR gate is connected after the modulo-2 feedback, with C1 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 n 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. Therefore, it's considered more reliable than applying an RC configuratior) to the shift-register reset input to create a random turnon state.



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