Negative slew rate enhancement circuit for an operational amplifier
US5327100A · kind A · utility
8Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Mar 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45696
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier enhances its negative slew rate by providing more base current to a bottom PNP output drive transistor. A large signal applied at the inverting input of the operational amplifier unbalances the differential input stage and provides maximum current through a current mirror circuit to the base of the PNP output transistor. A transistor is biased on by sufficient current flow through the current mirror circuit to draw even more base current from the base of the PNP output transistor and thereby enhance its negative slew rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.