| 摘要 |
PURPOSE:To eliminate influences of a converter which obtains a reciprocal of a variation, by providing a latch circuit, where the output of an adder is held temporarily, and the adder, which outputs a carry output, instead of the converter and a frequency divider. CONSTITUTION:When a variation (c) is set to a register 2 from a computer 1, an adder 7 adds an absolute volue (d) of the variation and the output of a latch 8. The latch 8 holds an output (j) of the adder 7 and updates data by a clock (g). When the value of the adder 7 exceeds the maximum value, the adder 7 outputs a carry output (h) to carry. Then, an up/down counter 6 outputs a smoothly changed digital quantity by an initial value (a), a change direction (b) after setting, and the carry output (h). Thus, influences of the converter which obtains a reciprocal of the variation are eliminated.
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