Current output stage having automatic active-passive switching
US9946280B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2011 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/618
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a current output stage (100) comprising an input (IN), an output (OUT) for connecting to an input of a unit (200) to be supplied with current, a control stage (T1, T2, Z1), which sets the output current (Iout), and an energy supply stage (Uv;Uv,−Uv), which can provide energy for the output current (Iout). The current output stage (100) comprises a first transistor (T1), which controls the output current in a closed-loop in the passive operating mode, and the current output stage (100) contains a second transistor (T2; T2, T3), which controls the output current (Iout) in a closed-loop in the active operating mode, wherein the first transistor (T1) and the second transistor (T2; T2, T3) is controlled by a control stage OP1) in an open loop, and wherein in the active operating mode the energy supply stage (Uv;Uv,−Uv) is controlled in an open loop such that same provides energy for the output current (Iout).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.