Design of High Voltage Pulse Generator and Receiver Circuit for Ultrasonic velocity and Absorption Measurements In liquids

Abstract: This paper discusses the design and development of a single channel transceiver for broad bandwidth ultrasound applications.. The transceiver has the pulser as transmitter and a broad bandwidth receiver. A high frequency ultrasound transducer is used both for the transmission of ultrasound pulse and for receiving the ultrasound echoes. The pulser circuit is a high voltage, high speed, switching circuit designed for 20 V pulse amplitude and pulse width as low as 10 ns. The preamp is a low noise, wide bandwidth amplifier and the time gain compensation circuit has a low noise figure and a bandwidth of 15 MHz. Custom, miniaturized PCB’s have been fabricated and tested for the R.F. electronics. The performance characteristics of 5 MHz transducers are tested and calibrated.

Keywords: Pulse generator, Pulser-Receiver, Ultrasonic measurements.