High voltage RF-multiplexer for medical applications

Abstract

Abstract Ultrasound solutions are widely used in industrial and medical applications for distance measurements and imaging. A multiplexing switch unit is required to drive a piezoelectric transducer array for imaging by a single ultrasound pulse source. Higher frequencies are required for better image resolution. The necessary multiplexer has to handle these high driving voltages up to 100 V at high frequencies up to 100 MHz. The test environment and methodology for semiconductor multiplexer circuits are described in this article. The main focus is set on the generation of large test signals needed to drive the multiplexer.