| 摘要 |
<p>A spread spectrum clock generator capable of generating a smooth spread spectrum clock while suppressing an increase in the size of the circuitry includes a phase interpolator, receiving a clock signal from a clock input terminal and a control signal (an up signal and/or down signal) are input, for adjusting the phase of an output clock signal in accordance with the control signal and outputting the resultant clock signal, and a control circuit for counting the clock signal that enters from the clock input terminal and outputting the control signal to the phase interpolator, the control signal varying the phase of the output clock signal based upon the count result. The phase of the output clock signal from the phase interpolator varies with time and is frequency-modulated within a prescribed frequency range.</p> |
