Digital phase-locked loop with a dynamic element matching circuit and a digitally controlled oscillator
US11184013B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2021 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Feb 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of operating a phase-locked loop (PLL) having a dynamic element matching (DEM)-driven digitally controlled oscillator (DCO) includes calibrating the PLL, where calibrating the PLL includes opening a loop of the PLL and performing linearity measurements of the DEM-driven DCO when the loop of the PLL is open and when dynamic matching of the DEM-driven DCO is activated, where performing the linearity measurements includes: applying test control words to the DEM-driven DCO to obtain frequencies in a first range of frequencies; and measuring output frequencies of the DEM-driven DCO corresponding to the test control words. Calibrating the PLL further includes calculating calibration information based on the test control words and the measured output frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.