Title :
Improved electronic readout circuit for resonant acoustic sensors
Author :
Rocha, Daniel ; Ferrari, Vittorio ; Jakoby, Bernhard
Author_Institution :
Inst. of Sensor & Actuator Syst., Vienna Univ. of Technol., Austria
Abstract :
A novel circuit for the compensation of the spurious admittance of TSM (thickness shear mode) resonator sensors is proposed. It compensates both the spurious capacitance and conductance, and as such is well suited for measurement in conductive liquids. Design equations, simulations and measurement results of a bread-boarded prototype are presented.
Keywords :
acoustic resonators; acoustic transducers; chemical sensors; compensation; readout electronics; signal processing equipment; viscosity measurement; TSM; chemical sensors; conductive liquid measurement; electronic readout circuit; negative feedback; quadrature compensation; quadrature demodulator; resonant acoustic sensors; spurious admittance compensation; spurious capacitance compensation; spurious conductance compensation; thickness shear mode sensors; variable gain amplifiers; viscosity sensors; Acoustic measurements; Acoustic sensors; Admittance; Capacitance measurement; Circuit simulation; Conductivity measurement; Equations; Liquids; RLC circuits; Resonance;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426092
