PSEUDO RANDOM PATTERN GENERATION MECHANISM AND INCREASE OF PHASE SHIFT

摘要

PURPOSE: To enhance the reliability of components by providing a linear feedback type shift register means and means for increasing the phase shift between output line from adjacent cells. CONSTITUTION: A shift register 10 includes a plurality of cells 11 each of which can store 1 bit. Each of 31 cells can receive a 1 bit signal from the left and deliver a 1 bit signal to the right. A selected signal from the output line of a cell (e.g. cell #1) is subjected to modulo 2 addition (i.e., exclusive OR) and fed back to the input of cell #1. More specifically, outputs from cells #6 and #31 are added by LFSR at an exclusive OR gate 14 according this system and the output from gate 14 is delivered to an exclusive OR gate 13. The gate 13 adds the output from cell #2 thereto by modulo 2 system.