Operational amplifier capable of compensating offset voltage
US8040180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2007 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Dec 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45183
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier capable of compensating offset voltage includes an input stage circuit having a positive input end, a negative input end, a first current output end, and a second current output end, for outputting current corresponding to voltage received by the positive and negative input ends, an output stage circuit coupled to the first current output end and the second current output end of the input stage circuit, for outputting voltage according to current outputted from the first current output end and the second current output end, and an trimming device coupled between the input stage circuit and the output stage circuit, for adjusting current of the first current output end or the second current output end for compensating offset voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.