Electronic arrangement, optical gas sensor including such an electronic arrangement, and method for controlling the power of a radiation source using such an electronic arrangement

A method for controlling power of a radiation source,

• the method comprising:
• providing an electronic arrangement comprising:
• a radiation source
• a controlled voltage converter configured to provide a lamp voltage for the radiation source in order to operate the radiation source in an ON state for a pulse duration, and to regulate the lamp voltage in such a way that a reference voltage at a feedback terminal of the voltage converter is maintained substantially constant;
• and
• a voltage source connected to the feedback terminal and configured to provide, via the feedback terminal for acting on the regulation of the voltage converter, a time-dependent control voltage having a predefined time profile,
• wherein the voltage converter is configured to select a time profile for the lamp voltage as a function of the predefined time profile of the time-dependent control voltage in such a way that a power of the radiation source deviates from a constant power value by no more than 25% during at least 90% of the pulse duration;
• operating the radiation source in the ON state for the pulse duration;
• and
• providing the time-dependent control voltage in such a manner that the power of the radiation source deviates from the constant power value by no more than 25% during at least 90% of the pulse duration.