Operational amplifier and operating method thereof
US7474242B2 · kind B2 · utility
0Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2007 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Jul 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45724
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier is disclosed. The operational amplifier comprises an input stage and a loading stage. The input stage receives a differential input signal pair corresponding to a first frequency band. The loading stage is coupled to the input stage. The loading stage outputs an amplified differential output at output nodes. The loading stage comprises a flicker noise source and a modulating device. The modulating device is coupled to the flicker noise source. The modulating device modulates flicker noises into a second frequency band. The modulating device is not within a signal path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.