| 摘要 |
PURPOSE:To minimize an offset at each range by filling in any bit string to a low-order side blank produced by performing digital expansion with shift from a high order by a required bit length. CONSTITUTION:Digital data of 3 bits and range data enter a digital expanding circuit 3, where they are expanded digitally and outputted as 6-bit data. Since the input data has 3 bits, a blank is produced in the low order of any range in the 6-bit output. Thus, data having a required bit length is extracted from the high order of the bit string 1,000- and the blank is filled into the low-order blank. Thus, the offset in each range is made to zero and the positive and negative amplitudes are made equal, thereby eliminating a step at the range changeover point. |
