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AssigneeKrohne AG
InventorArie Huijzer
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A transmitting and receiving circuitry system for an ultrasonic flowmeter includes an ultrasound transducer interface for connection to an ultrasound transducer of the ultrasonic flowmeter, an amplifier with a first input and a second input, as well as a signal generator for activating the ultrasound transducer, with the first input of the amplifier connecting to the signal generator while the second input of the amplifier connects both to the ultrasound transducer interface and, via a feedback element, to the output of the amplifier. The impedance of the feedback element can be varied, permitting an adaptation of the transmitting and receiving circuitry to the operating mode of the ultrasonic flowmeter, in particular an adaptation to a transmitting or receiving mode, whereby an overall improvement of the signal-to-noise ratio is attainable. A method for operating such a system is also disclosed.
Transmitting and receiving circuitry for an ultrasonic flowmeter having an ultrasound transducer, said circuitry comprising
A method for operating a transmitting and receiving circuitry system of an ultrasonic flowmeter that includes an ultrasound transducer interface connected to an ultrasound transducer of the ultrasonic flowmeter, an amplifier with a first input and a second input, and a signal generator, where the first input of the amplifier connects to the signal generator while the second input of the amplifier connects both to the ultrasound transducer interface and, via a feedback element, to the output of the amplifier, and the ultrasound transducer is activated by the signal generator, said method comprising selectively controlling the impedance of the feedback element, wherein the transmitting and receiving circuitry system alternates between a transmitting mode wherein the signal generator feeds a voltage signal to the ultrasound transducer causing the impedance of the feedback element to be adjusted to a lower value, and a receiving mode wherein no voltage signal is sent to the ultrasound transducer and the impedance of the feedback element is adjusted to a higher value.
Dependencies are inferred from the claim text.