Frequency synthesizer using digital pre-distortion and method
US7075376B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Dec 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1976
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method includes identifying a setting for a capacitor bank associated with a voltage-controlled oscillator in a closed-loop phase-locked-loop. The setting represents a combination of one or more capacitors in the capacitor bank. The method also includes estimating a gain introduced by the closed-loop phase-locked-loop when the oscillator operates using the identified setting. The method further includes estimating a response of a loop filter in the phase-locked-loop and identifying one or more coefficients for a digital filter using the identified gain and the identified loop filter response. The digital filter is operable to filter an input signal. In addition, the method includes modulating the filtered input signal using the phase-locked-loop to produce an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.