C7.4 - Increasing the Dynamic Range of a Digitizing Impedance Analyzer Circuit for Resonating Sensors

A. O. Niedermayer, Th. Voglhuber-Brunnmaier, J. Sell & B. Jakoby
Resonant sensors are used in a wide range of applications, e.g. as microbalances, chemical sensors in liquid and gaseous environments, and for physical property sensing of liquid and viscoelastic media. The signals obtained from these sensors are most often afflicted with unwanted or spurious components which, depending on sensor type and operating conditions, can be caused by parasitic sensor effects or by the implemented sensor interface circuit. The very common way of handling these effects...