Differential operational amplifier
US5157349A · kind A · utility
4Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3059
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The output stage of a differential operational amplifier includes a source follower amplifier and a common source amplifier which are driven by two complementary outputs of a differential input stage. Continuous-time feedback circuits are provided to set the quiescent biasing conditions accurately. The differential operational amplifier has a low output impedance and a large output voltage swing with negligible open loop gain degradation when the size of the load resistance is varied. Floating compensation capacitors reduce the total capacitor value and the physical area needed for the operational amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.