Sensor Frontend Architecture

In this chapter, the three main functional blocks in the smart sensor (analog signal conditioning, analog to digital conversion, and logic) are analyzed. It will be shown that most of the system, architectural, and circuital choices must be based on technology constraints and not on the target application, as it usually happens in standard technologies. First the analog signal conditioning chain is considered from a system point of view, choosing an architecture suitable for our dual-gate p-type only TFT technology.