设计一个合适的保护开关的最难点是适合印制板上的所有布线，并保证适当的电压空间。
The hardest part of designing a properly guarded switch is to fit all the traces on the board and maintain proper voltage spacing.
模拟信号须转换成适合于变换到数字形式的电压信号。
The analog signals must be converted to voltage signals suitable for conversion to digital form.
尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。
So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.
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