Switched integrator preamplifier operated in pulse current integrator mode or continuous current mode correspond to the high energy X-ray radiation from an accelerator and the low energy X-ray radiation from an X-ray generator respectively. 开关积分型前放有两种工作方式:脉冲电流积分方式和连续电流积分方式。它们分别用于实现加速器脉冲束X射线和X光机连续X射线辐照下探测器的输出电流转换。
To ensure continuous current in the generator armature and minimize the switch loss in the IGBT, the determination method for the PWM frequency was given out. 给出了以保证电机电枢电流连续和实现开关损耗最低为目标的PWM开关频率的确定方法。