场扫描电路是为场偏转线圈提供锯齿波电流而产生磁场,使电子束在显像管中作自上而下的扫描运动,产生场垂直光栅。由于这一部分关系到光栅的显示,其内外电路相互作用较大、输出电压较高,因而也是问题常出现的电路部分之一。本文介绍两例较易出 Field scanning circuit for the field deflection coil sawtooth wave current generated by the magnetic field, the electron beam in the tube for top-down scanning motion, resulting in field vertical grating. Since this part is related to the display of the grating, the internal and external circuits interact with each other more so that the output voltage is high and therefore one of the circuit parts where problems often occur. This article describes two more easily out