将以下段落翻译为英文：感温模块中亚阈值电流偏置电路采用工作在深线性区的MOS电阻取代传统电阻元件来产生纳安级偏置电流节省了芯片面积。

The sub-threshold current bias circuit in the temperature sensing module uses MOS resistors operating in the deep linear region instead of traditional resistor components to generate nanoampere bias currents, saving chip area.