基于台积电(TSMC)0.6μmCMOS(互补金属氧化物半导体)工艺设计了一款恒定跨导轨对轨输入/输出运算放大器.不同于传统的实现恒定跨导的技术,在电路设计实现上通过一个简单的检测电路,使互补差分对在整个共模输入电压变化范围内交替工作,实现了跨导恒定.同时为了得到较高的转换速率,加入了转换速率增强结构,使转换速率高达116V/μs.在Hspice仿真平台下,对运算放大器进行了模拟仿真,同时经投片验证,结果表明该轨对轨运算放大器具有良好的性能,静态功耗小于1.5mW. Based on the TSMC 0.6μm CMOS (Complementary Metal Oxide Semiconductor) process, a constant cross-rail rail-to-rail input / output operational amplifier is designed. Unlike traditional techniques for achieving constant transconductance, the circuit design is implemented using a simple The detection circuit makes the complementary differential pair work alternately in the range of the common-mode input voltage to achieve constant transconductance, and in order to obtain a higher conversion rate, a conversion rate enhancement structure is added to make the conversion rate up to 116V / μs. Under the Hspice simulation platform, the operational amplifier is simulated and verified by the chip. The results show that the rail-to-rail operational amplifier has good performance and the static power consumption is less than 1.5mW.