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RESEARCH PRODUCT
Equivalence of Open-Loop and Closed-Loop Operation of SAW Resonators and Delay Lines
Michael HoftEnrico RubiolaJean-michel FriedtPhillip Durdautsubject
[SPI.OTHER]Engineering Sciences [physics]/OtherPhysics - Instrumentation and DetectorsComputer scienceddc:621.3ResonatorPhase NoiseFOS: Physical sciencesSAW sensorslcsh:Chemical technology01 natural sciencesBiochemistryArticleAnalytical Chemistryfrequency detectionResonator0103 physical sciencesPhase noiseElectronic engineeringreadout systemsFigure of meritddc:6lcsh:TP1-1185[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Electrical and Electronic EngineeringReadout Systems010301 acousticsInstrumentationDelay LineDynamic rangeFrequency Detection010401 analytical chemistryBandwidth (signal processing)Surface acoustic waveOpen-loop controllerarticlePhase DetectionLinearityInstrumentation and Detectors (physics.ins-det)Open-loop Vs. Closed-loopdelay lineAtomic and Molecular Physics and Opticsphase noise0104 chemical sciencesSaw Sensorsopen-loop vs. closed-loopresonatorPhase-sensitive Sensorsphase detectionphase-sensitive sensorsdescription
International audience; Surface acoustic wave (SAW) sensors in the form of two-port resonators or delay lines are widely used in various fields of application. The readout of such sensors is achieved by electronic systems operating either in an open-loop or in a closed-loop configuration. The mode of operation of the sensor system is usually chosen based on requirements like, e.g., bandwidth, dynamic range, linearity, costs, and immunity against environmental influences. Because the limit of detection (LOD) at the output of a sensor system is often one of the most important figures of merit, both readout structures, i.e., open-loop and closed-loop systems, are analyzed in terms of the minimum achievable LOD. Based on a comprehensive phase noise analysis of these structures for both resonant sensors and delay line sensors, expressions for the various limits of detection are derived. Under generally valid conditions, the equivalence of open-loop and closed-loop operation is shown for both types of sensors. These results are not only valid for SAW devices, but are also applicable to all kinds of phase-sensitive sensors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-07 |