保证过电流保护的同时，还提高了开关频率，减小了输出谐波。
The switch frequency is increased and the output harmonic is decreased while the overcurrent protection is ensured.
同时，高速交流传动机车广泛采用高开关频率器件的脉宽调制（PWM）逆变器，使得逆变器输出脉冲具有陡上升沿。
Meanwhile, PWM inverters using high switching frequency device that shortens the rise time of PWM output pulse have been widely applied in high-speed AC driving locomotive.
主放大器采用开关电容共模反馈电路在获得大输出摆幅的同时降低了功耗。
Used the switched capacitor Common Mode Feedback circuit(CMFB) in main amplifier to achieve a large output voltage swing and decrease the static power consumption at the same time.
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