Compensation of common mode voltage drop of sensing amplifier output due to decision feedback equalizer (DFE) taps
US11349445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2020 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Jan 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00013
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver including a first differential sense amplifier configured to amplify an input differential data signal to generate an output differential data signal; a first set of one or more differential decision feedback equalizer (DFE) taps configured to modify the output differential data signal based on a set of one or more differential tap signals, wherein the first set of one or more differential DFE taps affect an output common mode voltage associated with the output differential data signal; and a compensation circuit configured to adjusts the output common mode voltage to compensate for the effect on the output common mode voltage by the set of one or more differential DFE taps. The compensation circuit includes reference and replica receivers to generate reference and replica output common mode voltages, and a feedback circuit to adjust the output common mode voltage based on the reference and replica output common mode voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.