Ultrasonic transmitter circuit with matched impedance

Abstract

A transmitter circuit and method for an ultrasonic thickness measurement system having an ultrasonic transducer and a cable with known cable impedance, the cable connecting at least the transmitter circuit to the ultrasonic transducer, the transmitter circuit comprising: an electrical pulse voltage signal emitter for producing an electrical pulse voltage signal to be propagated over the cable to the ultrasonic transducer, the electrical pulse voltage signal having a pulse nominal voltage value; a matched impedance circuit for matching a cable impedance of the cable at the transmitter circuit for an electrical parasitic reflection signal of the electrical pulse voltage signal, the electrical parasitic reflection signal being caused by an impedance mismatch between the cable and the ultrasonic transducer, a parasitic nominal voltage value of the electrical parasitic reflection signal being at most the pulse nominal voltage value.

Dependencies are inferred from the claim text.