Common-gate amplifier for high-speed DC-coupling communications
US9438188B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2014 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Sep 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45424
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a receiver comprises a differential common-gate amplifier having a differential input and a differential output, wherein the differential input comprises a first input and a second input, and the differential common-gate amplifier is configured to amplify an input differential signal at the differential input into an amplified differential signal at the differential output. The receiver also comprises a common-mode voltage sensor configured to sense a common-mode voltage of the input differential signal, a replica circuit configured to generate a replica voltage that tracks a direct current (DC) voltage at at least one of the first and second inputs, and a comparator configured to compare the sensed common-mode voltage with the replica voltage, and to adjust a first bias voltage input to the differential common-gate amplifier based on the comparison, wherein the DC voltage depends on the first bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.