Delta-sigmal modulator-based multi-rate digital-to-analog converter with digital pre-distortion
US11716093B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2021 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Dec 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of applying digital pre-distortion includes: outputting, by a look-up table, a first table value based on an input digital signal; adding the first table value and the input digital signal to generate a first combined signal comprising a first combined value having a first integer coefficient and a first fractional coefficient; separating the first integer coefficient from the first fractional coefficient to generate a first integer signal representing the first integer coefficient and a first fractional signal representing the first fractional coefficient; generating a delta-sigma modulated signal based on the first fractional signal; converting, by a first digital-to-analog, a first digital signal into a first analog signal, wherein the first digital signal is representative of the first integer signal; and converting, by a second DAC, a second digital signal into a second analog signal, wherein the second digital signal is representative of the delta-sigma modulated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.