关于屏蔽小电流、高电阻和高阻电压电路的更多信息，可参考第5章。
Further information on shielding low current, high resistance, and high impedance voltage circuits can be found in Section 5.
偏压电路依据参考电压来偏压第一级电路与电流补偿电路，并设定电流补偿电路的偏压。
Bias circuit according to the reference voltage to bias the first stage circuit and the current compensation circuit, and set the bias current compensation circuit.
其原理包括参考电压电流电路，2.7V及1.8V电压调整电路，过流保护电路以及低压检测电路四个部分。
The schematics includes four parts: bandgap reference voltage and reference current, 2.7V and 1.8V regulator, over-load protection , Low Battery Detection (LBD) .
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