Circuit arrangement and method for the operation of a circuit arrangement
US8274411B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Aug 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement (1) comprises a current source (10), a comparator (50) and a control device (90). The current source (10) serves for supplying a light-emitting diode (41). The comparator (50) may be coupled to the light-emitting diode (41) at a first input (51) via a push-button (101). The comparator (50) may be fed with a reference voltage (VREF) at a second terminal (52). The control device (90) selectively puts the current source (10) into a first operational state (A) for polling a push-button position of the push-button (101) or into a second operational state (B) for emitting radiation by means of the light-emitting diode (41).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.