A Multi Maximal Length Multi Time Period Pseudorandom Bit Sequence (PRBS) Generator

A novel method of generating a pseudorandom binary sequence (PRBS) test signal generator is presented. A traditional PRBS generator uses a linear feedback shift register (LFSR) which generates a single maximum length sequence pattern having a fixed period. In this paper, three shift registers with feedback connections are employed in which the preset inputs of the shift registers are changed only on completion of their length sequences. These preset inputs are changed by employing a counter, the time period of the clock of which equals the time of the length sequence. Thus, by employing a limited number of shift registers, a considerable increase in the length sequence is possible. This longer length sequence would enable to detect malfunction in a better way associated with specific data patterns.