Amplifier stage, operational amplifier and method for amplifying a signal
US7443238B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Nov 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45648
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier stage includes a first and a second signal path having a series connection of a first transistor of a first conduction type which forms a control input for receiving an input signal to the amplifier stage and a second transistor of a second conduction type. The amplifier stage further includes a first and second signal output which are formed by a respective connection node of the respective first and second transistors. For each of the first and the second signal path, the amplifier stage includes a third transistor of the second conduction type which is connected to the respective second transistor as current mirror, and a fourth transistor of the first conduction type which is connected to the respective first transistor as a current mirror and which is for controlling the third transistor of the other signal path, respectively. Furthermore, for each of the first and the second signal path, a current source is provided with is connected in parallel to one of the respective first, second, third, and fourth transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.