Bipolar class AB folded cascode operational amplifier for high-speed applications
US6710654B2 · kind B2 · utility
13Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45631
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention (800) comprises an operational amplifier with a first stage comparator circuit (801) for biasing a second stage folded cascode amplifier circuit (802). The result is that the input differential voltage signal to output current signal is transformed from a tanh function to a sinh function. The present invention provides the low noise, low distortion, high gain, wide bandwidth and good DC performance characteristics of the folded cascode op-amp configuration, with much improved slew rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.