Analog clock module
US6188253A · kind A · utility
22Cited by
7References
14Claims
0Family size
Inventors
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.