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Many emerging micro/nano sensor interfaces suitable for microsystem integration produce a change of impedance that must be monitored over a broad frequency range. This paper introduces a mixed-signal integrated circuit that can extract and digitize the real and imaginary components of a sensor's impedance response. The ultra compact size of this circuit enables each element in a multi-channel sensor...
With the rapid progress in CMOS compatible microfabrication of biosensors, there is an emerging need to miniaturize biosensor arrays onto the surface of silicon chips that acquire and process sensor data, permitting improved sensitivity, cost and throughput. In this paper, a low power circuit that extracts and digitizes sensor impedance information is presented. Composed of a novel multiplying integrator...
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