Charge-sharing and charge-redistribution DAC and method for successive approximation analog-to-digital converters
US9954549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2017 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | May 15, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hybrid digital-to-analog converter including a charge-sharing digital-to-analog converter and a charge redistribution digital-to-analog converter is provided. The charge-sharing digital-to-analog converter is configured to receive a digital input signal having multiple bits. The bits include a most-significant-bit and a least-significant-bit. The charge-sharing digital-to-analog converter is configured to convert the most-significant-bit to provide a first portion of an analog signal and selectively share charges of first capacitors during a successive approximation of the most-significant-bit. The charge redistribution digital-to-analog converter is configured to convert the least-significant-bit to provide a second portion of the analog signal. The charge redistribution digital-to-analog converter performs charge redistribution by selectively connecting second capacitors to receive reference voltages during a successive approximation of the least-significant-bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.