Transmitter-receiver circuit for ultrasonic flowmeter, has generator for driving transducers, comparator and common control point of switches decoupled from each other by transistor

摘要

The circuit has at least two ultrasonic measurement transducers (1,2) for transmitting and receiving ultrasonic signals in opposite directions over a measurement path. The transducers can be connected via at least two switches (3,4) to a common control point (5) for connection to a generator (6) for driving the transducers and to a comparator (7) to which the received signals of the transducers are fed. The generator, the comparator and the common control point of the switches are decoupled from each other by a transistor (8).