One-bit digital-to-analog converter offset cancellation
US9204215B2 · kind B2 · utility
1Cited by
3References
15Claims
0Family size
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Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | May 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is described Audio driver circuit comprising a main, 1-bit digital-to-analog converter, adapted to receive a 1-bit oversampled digital audio signal. Thanks to an auxiliary digital-to-analog converter which converts into the analog domain a digital offset compensation value stored in e.g. an OTP memory register 34, and to a summing and filtering arrangement, it is possible to reduce the offset cancellation granularity in order to compensate for the offset of the main digital-to-analog converter in the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.