Reducing noise and/or power consumption in a switched capacitor amplifier sampling a reference voltage
US7358801B2 · kind B2 · utility
36Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Nov 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/294
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Equal common mode voltage is present at the input terminals of an operational amplifier with amplifies the residue signal in a stage of an ADC in two phases while reducing the noise introduced into the amplified signal. A reference capacitor is coupled between an input terminal of the operational amplifier and a reference voltage in a first phase, and between the input terminal and a the reference voltage but with opposite polarity in the second phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.