Pulse generator for ultrasonic piezoelectric transducer arrays based on a Programmable System-on-Chip (PSoC)

Abstract

This paper describes the design of a pulse generator to excite PZT and PVDF ultrasonic transducer arrays, based on the Programmable System-on-Chip (PSoC) module. In this module, using programmable logic different pulses were implemented; these pulses are required in ultrasonic applications for multiple channels to excite PZT and PVDF transducer arrays. To excite multiple elements, bursts are required which can be generated simultaneously or out of phase, generating dynamic wave fronts. For medical applications where bidirectional blood flow is detected burst and quadrature pulses are used. These pulses can be generated independently or in combinations, as simultaneous pulses, shift pulses or burst. This module can operate with programmable frequencies from 3-74 MHz; its programming may be versatile covering a wide range of ultrasonic applications.