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US09306577B2 Supply voltage drift insensitive digitally controlled oscillator and phase locked loop circuit 有权
电源电压漂移不敏感数字控制振荡器和锁相环电路

Supply voltage drift insensitive digitally controlled oscillator and phase locked loop circuit
Abstract:
A digitally controlled oscillator includes a ring oscillator and a first supplementary circuit. The ring oscillator is coupled to a supply voltage and generates a signal oscillated at an oscillating frequency. The oscillating frequency is controlled by a digital code and further varies with a supply voltage drift in a first direction. The first supplementary circuit is coupled to the ring oscillator and facilitates the oscillating frequency to vary with the supply voltage drift in a second direction reverse to the first direction.
Abstract(Chinese):

数字控制振荡器包括环形振荡器和第一辅助电路。 环形振荡器耦合到电源电压并产生以振荡频率振荡的信号。 振荡频率由数字代码控制，并进一步随第一方向的电源电压漂移而变化。 第一辅助电路耦合到环形振荡器，并且促使振荡频率随着与第一方向相反的第二方向上的电源电压漂移而变化。

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