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SOI & CMOS technologies have been compared many times in term of efficiencies and performances with regards to different types of applications. Nowadays, the ASIC combining optical sensor with its readout and signal processing electronics on the same chip becomes more and more a target for applications mainly in the bio and the automotive domain. Many publications have addressed the design issues...
This paper analyzes some advantages of Silicon-on-Insulator (SOI) based photodetectors for bioluminescence imaging. It shows that SOI based sensors not only solve the bulk carriers problem, it can also act as a very selective spectral filter by acting as a resonant cavity, which is useful in application with a very narrow spectrum of interest, such as bioluminescence imaging. Then, the authors discuss...
This paper presents a fully integrated Hall sensor microsystem with a current-mode output. The system operates in open-loop and includes a Hall sensor with internal biasing, a fully differential front-end, a preamplifier chain and a voltage-to-current converter (V-I). The effects of the V-I block on the sensitivity drift of the system are analyzed and a current biasing of the Hall cells is proposed...
Several Hall sensor configurations have been integrated in CMOS technology and analyzed in terms of offset at room temperature and offset drift. We looked for the best geometry that would minimize the offset and its drift. The targeted specification was ±30 µT for offset at room temperature and ±0.3 µT/°C for the drift. The measurement setup developed allows a clean, reliable and fast analysis of...
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