| 摘要 |
<p>VERNIER ADDRESSING APPARATUS A vernier address scale reduces the number of addressable memory locations required for numerical look-up tables. Readonly memories (ROMs) store the data of linear or non-linear functions. Decoders determine which ROM is selected and advantage is taken of accuracy improvement as numbers become larger by dropping least significant bits as the vernier address scale moves from one ROM table to another. Accuracy is further improved by using a method of one-half level quantization step for rounding. This reduces the size of numerical tables for math processing of reciprocals, roots of numbers, powers of numbers, logarithms, trigonometric and exponential functions.</p> |
