Continuous-time oversampled converter having enhanced immunity to noise
US8570200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2011 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Feb 12, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/304
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a clock source and an oversampled continuous-time digital-to-analog converter. Noise signal is added to the clock signal as the clock signal is generated and/or routed. The oversampled continuous-time digital-to-analog converter includes a sigma-delta modulator to perform noise shaping on input data samples and provide intermediate data samples; a filter to filter the intermediate data samples and generate filtered samples, the filter having a transfer function that has a stop band at a frequency range that includes the frequency of the noise signal or a component of the noise signal; and a continuous-time digital-to-analog converter to convert the filtered samples to an output analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.