A New CMOS Integrable Oscillating Circuit for High-Value Wide-Range Resistive Sensors

摘要

A new oscillating circuit is proposed to estimate resistance and parallel parasitic capacitance of chemical sensors. The circuit is able to reveal resistance in a wide range, from tens of k驴 to over than 100 G驴. Experimental results of a discrete board prototype confirm the very good performance of post-layout simulation tests concerning the CMOS integrated implementation.