一种含有带隙基准源的低功耗运算跨导放大器的分析与设计

Design and Analysis of Low Power Gm_OTA Which Contains Bandgap Reference

提出一种含有带隙基准源的低功耗CMOS运算跨导放大器的设计方法,在Candence的schmatic工具下完成了电路的搭建与整理,并分析了其基本结构.在此基础上,运用Hspice仿真工具建立了电路模型,并完成了系统仿真验证.在7.75V电源电压下,基于csmc 0.5μm工艺模型,本设计可驱动75 pF负载,相位裕度为135度,单位增益带宽为1.19 MHz,静态功耗为3.43 mW,实现了低功耗运算跨导放大器的良好性能.

In this article,a design method of low power Gm_OTA which contains bandgap reference,the construction and neaten of circuit are finished in schematic of Candence,and the basic struction is analyzed.Basis on that,the system model is also established by Hspice Tool.At the same time,the simulation of the system model are accomplished through.Under 7.75V,on the basis of csmc 0.5um technics model,75pF load is drived by the design,the phasic margin is 135 degree,the unit plus bandwidth is 1.19MHz,the static power is 3.43mW,and good capability of low power Gm_OTA is carried out.