INSTRUMENT-ON-CHIP FOR IMPEDANCE TRACKING ON MICRO-SENSORS DOWN TO ZEPTOFARAD SENSITIVITY

  • Marco Sampietro (Keynote speaker)

    Activity: Talk or presentation › Invited talk › Science to science

    Description

    In the vast realm of sensors, one possible way to detect external physical quantities is to detect and track with time the variation of impedance that they produce on a suitably designed “sensing device”. The counting of biological cells when passing through the metal plates of a miniaturized capacitor is a simple example as well as the detection of magnetic beads by tracking the variation of a magnetoresistive multilayer. The requirement in sensitivity posed by scientific or industrial applications is often very high and can be possibly obtained only by integrating the sensor and the reading electronics into a single miniaturized chip thus optimizing their coupling. This seminar will highlight the main sources of noises in systems devoted to the measurement of electrical impedance and shows how indeed zeptoFarad sensitivity in the measurement of a capacitance can nowadays be achieved.
    Period15 Mar 2018
    Degree of RecognitionLocal