All-digital frequency synthesis with DCO gain calculation
US8000428B2 · kind B2 · utility
12Cited by
13References
21Claims
0Family size
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Key dates
| Filing date | Nov 22, 2002 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | May 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An all-digital frequency synthesizer architecture is built around a digitally controlled oscillator (DCO) that is tuned in response to a digital tuning word (OTW). In exemplary embodiments: (1) a gain characteristic (KDCO) of the digitally controlled oscillator can be determined by observing a digital control word before and after a known change (Δfmax) in the oscillating frequency; and (2) a portion (TUNE_TF) of the tuning word can be dithered (1202), and the resultant dithered portion (dkTF) can then be applied to a control input of switchable devices within the digitally controlled oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.