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A self-biased current buffer based on the quasi floating gate (QFG) approach to achieve class AB operation is presented in this paper. It was designed in standard 0.18μm CMOS process with 1.8V power supply. The buffer is able to copy an input current range of ±15μA with 8μA bias current. The total harmonic distortion (THD) remains below −84dB for 1 kHz frequency and maximum input current Ipp = 30pA...
We present electrochemical measurements obtained from chemical sensors that integrate conventional MOSFET devices along with SENSE/RE plates based on MIM (Metal-Insulator-Metal) structures that are all-integrated to the gate oxide of transistors using standard 0.18μm CMOS fabrication processing. Depending on the CMOS-based materials used as sensing plates for pH detection, different sensitivities...
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