Abstract: A fast electromagnetic deflection amplifier is essentially a wideband power amplifier. It is mainly used for driving the power stage of the magnetic deflection system in High-speed CRT display. The good performance of high stability is obtained by introducing a special feedforward to extend bandwidth. A yoke is designed based on a shunt-wound structure with multiple wire and in a non-sectionalized form without skeleton. In addition, the conjugate compensation is used to improve the display quality.