公开(公告)号：US20190086493A1

公开(公告)日：2019-03-21

申请号：US15708574

申请日：2017-09-19

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Zhenen Cao ,  Tiezheng Chen ,  Jie Zhou ,  Tao Ma ,  Margaret Wiza ,  Jiabin Yao ,  Juan Sabate

IPC: G01R33/385 ,  H03F3/217 ,  H03K7/08 ,  H03F1/56

Abstract: A gradient amplifier for use in a MRI system can be located in the scan room. The gradient amplifier includes pair of rails connected to a gradient power supply. The gradient amplifier also includes a H-bridge of switches which includes a first high side switch and a first low side switch connected in series between the pair of rails, and a second high side switch and a second low side switch connected in series between the pair of rails. The gradient amplifier further includes a first high side driver circuit, a first low side driver circuit, a second high side driver circuit, and a second low side driver circuit, each configured to drive the corresponding switch in the H-bridge. A common power source supplies power to all driver circuits, wherein power is supplied to the high side driver circuits through bootstrap circuits.