| 摘要 |
PURPOSE:To realize self-clocking, by dividing the data bits to every 4 bits to convert these bits into code words of 8 bits to 16 combinations of data bits and then applying NRZI modulation to the series of code words. CONSTITUTION:The data bits are divided to every 4 bits and then converted into code words P1-P8 of 8 bits to 16 combinations of data bits as shown in a table. Then NRZI modulation is applied to the series of code words. At least >=2 bits 0 are included between the bit 1 and 1 of the code word series, and the number of bits 0 is reduced down to <=8 at most. Thus the minimum magnetization inverting interval is set as Tmin=1.5T compared with the conventional interval T along with the maximum magnetization inverting Tmax=4.5T and the detecting window width Tw=0.5T, respectively. This process increases the linear bit density and realizes the self-clocking. |
