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This paper describes and addresses the challenges that are encountered while designing a 900 GHz antenna for FET detectors using a standard submicron CMOS technology. The reduced metal stack, the problem of surface waves and technology-related rules are taken into account in order to properly design an efficient antenna, with the objective to couple it to field-effect transistor (FET) detectors in a focal-plane array configuration. Simulations on a 0.15-μm standard CMOS technology show that up to 58% efficiency with responsivity in the several kV/W range can be achieved., Accepted author manuscript, Tera-Hertz Sensing

Microelectronics, Electrical Engineering, Mathematics and Computer Science

Microelectronics, Electrical Engineering, Mathematics and Computer Science

A complete front-end system for resistive gas sensor array is presented. The system is composed by a substrate temperature control circuit and by a read-out circuit. The temperature control allows maintaining a 100 degrees C temperature gradient selected in the temperature range [150 degrees C-350 degrees C] on the array of sensor. The gas sensor read-out circuit, which acts like a resistance-to-period converter, is suitable to be interfaced to a microcontroller in order to achieve a resolution error lower than 0.5% for a resistance ranging in [300k Omega-300M Omega]. The full device, including 8 read-out channels and 2 temperature control systems, is designed in a standard 0.35 mu m CMOS technology. The die area is 1.8mm(2) with a total power consumption of 30mW from a single 3.3V supply voltage