A CMOS integrated infrared radiation detector for flame monitoring

This paper presents an integrated infrared radiation detector for flame monitoring applications, fabricated in CMOS technology. The system discriminates the radiation of the flickering flame in an oil burner from the steady background radiation generated by the furnace by considering only the harmonic components of the infrared signal in the band from 50 Hz to 250 Hz. In order to maximize the flexibility and the robustness of the system, most of the signal processing is performed in the digital domain. Experimental results on an integrated prototype, confirming the validity of the proposed approach, are reported