公开(公告)号：US20230296769A1

公开(公告)日：2023-09-21

申请号：US18178110

申请日：2023-03-03

Applicant: STMicroelectronics S.r.I.

Inventor： Antonio Davide Leone ,  Vanni Poletto

IPC: G01S15/931 ,  G01S7/521

CPC classification number: G01S15/931 ,  G01S7/521 ,  G01S2015/937 ,  H04R17/00

Abstract: In accordance with an embodiment, an ultrasound transmitter device includes a transformer comprising a secondary winding configured to be coupled to a piezoelectric transducer; a plurality of transistors coupled to the primary winding of the transformer and to a ground terminal via a sense resistor; an amplifier having an output coupled to control nodes of the plurality of transistors, a first input coupled to the sense resistor, and second input coupled to a reference resistor; a switching circuit configured to alternately couple control nodes of the plurality of transistors to an output of amplifier and to a reference node via complementary pulse signals, wherein the switching circuit is configured to turn on and turn off the plurality of transistors and operate the plurality of transistors in a push-pull manner; and a digital-to-analog converter having an output coupled to the reference resistor.