amplifying signals in switched capacitor environments
US6400301B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Apr 3, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2481
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplification circuit sharing a main amplifier in two gain stages while minimizing power consumption. A Miller Compensated Amplifier contains the main amplifier and a pre-amplifier, with the output of the pre-amplifier being connected to the input of the main amplifier. In a first gain stage, the two amplifiers together amplify an input signal. The main amplifier is then disconnected from the pre-amplifier in a second gain stage to further amplify the amplified signal of the first gain stage. A capacitor is configured to act as a compensation capacitor of the main amplifier in the first gain stage, and as a sampling capacitor in the second gain stage. The amplifier circuit may be implemented in an ADC of a digital camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.