Princple of high-power amplifier in MRI gadients system / 医疗卫生装备

This paper introduces the theory and the main circuit of MRI gradients high-power amplifier,especially the operation principles of its power modules and pulse-width modulators,which is helpful for maintenance of the amplifier.

Some Problems Must be Adverted in the Medical Equipment Design and Application of the PA-series High Power Amplifier / 医疗卫生装备

This paper discusses some problems must be adverted in the design and application of the PA- series high power amplifier for example as the PA08 and the PA84. It focus in the power supply bypassing, overvoltage protection, current limiting, output protection and the engine installing problems as they are applied in the medical equipment output stage.