Active common mode feedback for unbalanced input and feedback signals and methods thereof
US6411165B1 · kind B1 · utility
7Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2001 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Apr 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/331
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A noise shaped differential amplifier having a reduced common mode signal in accordance with an embodiment of the invention is described. In the described embodiment, the noise shaped differential amplifier includes a noise shaper having a common mode signal controlled by an attenuation operational amplifier that is coupled to a voltage divider circuit and a sense resistor divider. In this arrangement, the attenuation operational amplifier controls a virtual ground applied to the sense resistor divider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.