Circuit for generating a control current
US8258858B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2011 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Mar 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/227
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit includes a supply voltage and a control current line including two resistors. A sink current line branches off from the control current line between the resistors. A current sink transistor has an emitter that is connected to the sink current line and a collector that is connected to ground via a first further resistor. At least one reference transistor has an emitter that is connected to its base, to the supply voltage via a second further resistor and to the base of the current sink transistor. The collector of the reference transistor is connected to ground or to an emitter of a further reference transistor, which is switched in a manner similar to the first reference transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.