基于动态阈值PMOS的全差分运算放大器

A Fully Differential Operational Amplifer Based on Dynamic Threshold PMOS Technique

阐述了动态阈值电压晶体管SOI_PMOS(DTPMOS)的器件性能,PMOS晶体管的体端可以做为第四端来改善低电压模拟电路的特性。本文利用DTPMOS技术设计了一个低压低功耗的差分运算放大器。采用Chrt 0.18mCMOS工艺库,在Hspice下仿真结果表明:在电源电压为1V时,运放的增益为77.8dB,单位增益带宽为54.5MHz,相位裕度为60°,静态功耗为1.5mW。

The DTPMOS device performances are researched. The body terminal of PMOS transistors can be used as the forth terminal to enhance the performance of low-voltage analog circuits. To show the effectiveness of this technique, we have designed a low voltage low power operational amplifier. At a 1 power supply,using Chit 0.18umCMOS model, the operational amplifier was simulated by Hspice. The operational amplifier has a 77.8 dB gain, 60° phase margin, 54.SMHz bandwidth, and 1.SmW power consumption.