Analog-to-digital converter, signal processor, and method for analog-to-digital conversion
US8760330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converter for converting an input signal includes a sigma-delta modulator for receiving an analog modulator input signal and for providing a digital modulator output signal and an interference cancellation loop. The interference cancellation loop includes a digital filter, a digital-to-analog converter, and a signal combiner. The digital filter is configured to amplify the sigma-delta output signal in a frequency band, attenuate the sigma-delta output signal outside the frequency band and a transition band surrounding the frequency band, and provide a filtered digital feedback signal. The digital-to-analog converter is configured to convert the filtered digital signal to a cancellation signal. The signal combiner is configured to combine the input signal with the cancellation signal resulting in the modulator input signal, in order to at least partially cancel interference signal portions within the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.