外部参考电压可被应用到REF引脚转移所需数量的模拟视频电平下来。
An external reference voltage can be applied to the REF pin to shift the analog video level down by the desired amount.
PW M控制采用基于参考电压分解的多电平直接PWM算法，数字化实现容易。
A multilevel direct PWM control strategy based on reference voltage decomposition suitable for digital implementation was employed.
参考电压产生单元用以提供多个电压电平。
The reference voltage generation unit provides a plurality of voltage levels.
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