| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-multiplying circuit, which can generate multiplied signals corresponding to input signals over a wide range and which is reduced in circuit scale and power consumption. SOLUTION: The two-multplying circuit comprises a delay generation part 1, which inputs a subclock and generates a two-multipled clock 105 according to the value of delay data 112, a delay quantity correction part 2 which corrects and holds the delay data 112, a rise detection part 3 which generates a rise detection signal 107, and a duty detecting part 4 which generates a decision signal 110 according to the duty ratio of the two-multiplied clock 105. After the delay data 112 are corrected, the delay quantity correction part 2, rise detection part 3, and duty detecting part 4 stop operating and a main oscillator stops oscillating. A system, equipped with the two-multiplying circuit, operates according to the two-multiplied clock 105.
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