Chopped operational-amplifier (OP-AMP) system
US9564859B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Feb 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45512
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
One example includes an OP-AMP circuit system. The system includes a signal amplification path comprising a signal amplification path comprising a signal amplifier and an output stage. The signal amplification path can be configured to amplify an input voltage received at an input to provide an output voltage via the output stage. The system also includes an offset-reduction path coupled to the input of the signal amplification path and to an output of the signal amplifier. The offset-reduction path includes a transconductance amplifier and at least one chopper that are configured to mitigate noise in the signal amplification path and a noise-filtering feedback path configured to provide chopper feedback with respect to an offset voltage associated with the offset-reduction path, the noise-filtering feedback path comprising a feedback path input coupled to the input of the transconductance amplifier via a resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.