Method and apparatus for common-mode level shifting
US6924696B2 · kind B2 · utility
7Cited by
7References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Aug 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45941
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit in accordance with the invention comprises a differential amplifier; and a direct current (DC) source coupled with the differential amplifier. The DC source generates a direct current that is communicated in substantially predetermined portions to multiple inverting input terminals of the differential amplifier. The direct current is applied so as to shift a common-mode voltage of electrical signals that are processed by the differential amplifier. The shift in the common-mode voltage is proportional to the direct current generated by the DC source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.