简易系统级芯片内置高精度阻容振荡器的校准方法

Calibration method of high-precision RC oscillator built in a simple SoC

通过实验探究一种适用于超大规模集成电路(VLSI)领域系统级芯片片内阻容(RC)振荡器的校准方法。针对集成电路内部阻容振荡器输出时钟频率容易出现温漂、工艺离散导致不精确等现象,通过改良片内时钟校准逻辑,得出一种易于实现的、高效的、低成本的、可靠的方法。经试验验证,该方法可以有效保证振荡电路的输出精度,解决工艺、温度、电压等改变引起振荡器输出频率变化的问题。

A calibration method of RC oscillator in SoC suitable for the field of very large scale integrated circuit(VLSI)was explored by experiment.In allusion to the phenomenon that the output clock frequency of the RC oscillator in integrated circuit is prone to temperature drift and inaccuracy caused by process indiscretion,an easy.to.implement,high-efficient,low cost and reliable method is obtained by improving the calibration logic of the on-chip clock.The test verification indicates that the method can effectively guarantee the output precision of the oscillation circuit,and solve the problem of oscillator′s output frequency variation caused by the changes of process,temperature and voltage.