| 摘要 |
An analog clock apparatus is disclosed including a digital clock source for producing a digital waveform of a predetermined frequency and a direct-digital-synthesizer. The synthesizer has an input to receive the digital waveform and is operative to generate a resultant analog waveform. Prediction logic is coupled to the digital clock source and the synthesizer for determining the relative phase relationships between the digital waveform and the analog waveform. The prediction logic is responsive to a prediction clock having a clock frequency approximating that of said digital clock source.
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