Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same
US6741123B1 · kind B1 · utility
69Cited by
3References
8Claims
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Key dates
| Filing date | Dec 26, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Dec 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/331
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A delta-sigma modulator for driving an output stage is disclosed. The delta-sigma modulator operates between first and second voltages and includes a loop filter, a quantizer, and a feedback loop coupling an output of the quantizer and an input of the loop filter. The feedback loop includes compensation circuitry for compensating for variations in the first and second voltages in response to a measured average of the first and second voltages and a measured difference between the first and second voltages. Measuring circuitry measures the average and the difference of the first and second voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.