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针对低压低功耗条件下传统电流镜运算放大器电压增益和摆率严重降低的问题,提出了一种新型增益提升和摆率增强的CMOS电流镜放大器,并对其小信号增益和摆率进行了详细分析。理论分析表明,在不影响单位增益频率和相位裕度等小信号特性的同时,极大地提高了增益和摆率。仿真结果表明,与传统的CMOS电流镜放大器相比,该新型CMOS电流镜放大器的增益提高了15dB,正、负摆率分别提高到传统放大器的146倍和187倍。
Aiming at the problem of low voltage and low power consumption, the voltage current gain and slew rate of the conventional current mirror operational amplifier are greatly reduced. A new type of CMOS current mirror amplifier with gain gain and slew rate enhancement is proposed. Its small signal gain and slew rate Detailed analysis. Theoretical analysis shows that the gain and slew rate are greatly improved without affecting the small signal characteristics such as unity gain frequency and phase margin. The simulation results show that the gain of the new CMOS current mirror amplifier is 15dB higher than that of the traditional CMOS current mirror amplifier, and the positive and negative slew rates increase to 146 times and 187 times that of the conventional amplifier respectively.