Common mode sampling mechanism for residue amplifier in switched current pipeline analog-to-digital converters
US9503119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2015 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | May 18, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/44
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switched current pipeline analog-to-digital converter (ADC) integrated circuit. The integrated circuit comprises a track and hold circuit (T/H) and a residue amplifier. The T/H is configured to generate a differential output of the T/H based on an analog input. The residue amplifier is coupled to the T/H, configured to capture a sample of a common mode signal of the differential output of the T/H during a periodic pulse interval, wherein the pulse interval is less than half of the time duration of the period of the pulse, configured to generate a corrected input common mode feedback signal based in part on the sample of the common mode signal of the differential output of the T/H, and configured to generate a differential output of the residue amplifier based on the differential output of the T/H and based on the corrected input common mode feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.