In modern electronic systems, a reliable clock with precise frequency is a fundamental requirement. Moreover, the frequency and phase of the clock needs to be adjustable in some situations. So a method of full digital clock generation is proposed in this paper. Compared with other methods, it has two advantages: one is the capability of adjusting the frequency and phase on-line; the other is the high frequency precision. Experiment results show that this method can generate clock at 19.0484MHz, 19.0485MHz, 19.0486MHz with controlled phases, and the stability within 90 seconds is better than 0.05Hz.
All-digital self-adaptive PVTA variation aware clock generation system for DFS