The main difficulty with this approach is that in
integrating the switches, the substrates of S3 and S4 must
always remain reverse-biased with respect to their sources,
but not so much as to degrade their ON resistances.
只有最后but这半句不懂。
S3，S4是开关
器件是一个电源转换芯片（7660s）的说明书
先谢谢了
參考答案:1.这种方法的主要困难在于整合开关三、四的衬底必须始终保持反向偏颇就其来源但与其说他们就刻意矮化电阻
2.主要困难以这种方法是那在集成开关, S3 和S4 基体必须总保留reverse-biased 谈到他们的来源, 但至于不非常贬低他们的抵抗
