Wide-Band Piezo-Electric Ultrasound Transceiver Matching

Konferenz: Sensoren und Messsysteme 2014 - Beiträge der 17. ITG/GMA-Fachtagung
03.06.2014 - 04.06.2014 in Nürnberg, Deutschland

Tagungsband: Sensoren und Messsysteme 2014

Seiten: 4Sprache: EnglischTyp: PDF

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Ens, Alexander; Reindl, Leonhard M. (Laboratory for Electrical Instrumentation, University of Freiburg, Germany)

We present a method of piezo-electric transceiver matching for multiple frequencies. The aim is to adjust the amplitudes at different frequencies to the same level. Hence, analog to digital converter with low dynamic range (low voltage resolution) can be used to measure multiple frequencies with the same resolution. The optimization decreases the required dynamic range by 10 dB. Instead of using inductance or capacitance to adjust the amplitudes, we presented a methodology to optimize the matching with an additional measurement resistor.