Method and apparatus for single port modulation using a fractional-N modulator
US9035682B2 · kind B2 · utility
2Cited by
10References
17Claims
0Family size
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Key dates
| Filing date | Dec 29, 2012 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Dec 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/235
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for single port modulation of a phase locked loop frequency modulator includes a phase locked loop with a voltage controlled oscillator (VCO) and a integer loop for multiplying up the output of the VCO which is divided by a fractional-N modulator and divider in the feedback control. The integer loop enables the use of a high frequency reference oscillator that allows a closed loop response of the phase locked loop having a bandwidth that is wider than the modulation bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.