Operating circuit for a discharge lamp with early EOL detection

   
   

The invention relates to a novel operating circuit for a low-pressure discharge lamp 1 with early EOL detection via a measurement of the DC voltage between the electrodes 2, 3. In this case, the DC voltage can be modified by an offset voltage 10 such that only one polarity has to be taken into account during measurement.

A invenção relaciona-se a um circuito operando-se da novela para uma lâmpada de descarga low-pressure 1 com deteção adiantada de EOL através de uma medida da tensão de C.C. entre os elétrodos 2, 3. Neste caso, a tensão de C.C. pode ser modificada por uma tensão offset 10 tais que somente uma polaridade tem que ser feita exame no cliente durante a medida.

 
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> Circuit arrangement for feeding a load

> Method and apparatus for calibrating a measurement system

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