Common-mode control for AC-coupled receivers
US11005688B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2019 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Aug 21, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45652
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Implementations provide a receiver circuit that includes: an alternate current (AC)-coupling network to filter an input signal, the AC-coupling network including a first RC filter connected between a first input node and a first common node and a second RC filter connected between a second input node and the first common node; a differential amplifier coupled to the AC-coupling network and configured to receive a filtered input signal from the AC-coupling network and generate an output signal, the differential amplifier including a differential pair of transistors and a common-mode measurement network coupled to source terminals of a first and a second transistors in the differential pair; and a first operational amplifier having an input coupled to output terminal of the common-mode measurement network and an output coupled to the first common node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.