Systems and methods for clock mode determination utilizing divide ratio testing
US7286069B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2005 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | May 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for determining a data converter operating mode includes measurement circuitry for measuring master clock frequency of a master clock signal and a frequency ratio between a frequency of a data clock signal and the master clock frequency and a mapping system for mapping the measurement of the frequency ratio to an operating mode of the data converter. The mapping system generates a set of candidate divide ratios for dividing the master clock frequency to generate corresponding internal master clock frequencies of an internal clock signal and determines the lowest divide ratio which generates a supported internal master clock frequency. In an alternate embodiment, the mapping system determines the divide ratio required by a filter of the data converter by dividing the data clock to master clock frequency ratio by a data clock to internal clock frequency ratio between the data clock frequency and the frequency of an internal clock signal. In additional embodiments, the mapping system gives preference to natural number divide ratios during mode mapping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.