一种采用共栅频率补偿的轨到轨输入/输出放大器  

A Rail-to-Rail Input/Output Amplifier Using Common-Gate Frequency Compensation

作　　者：王为之[1] 靳东明[1] 

机构地区：[1]清华大学微电子学研究所,北京100084

出　　处：《Journal of Semiconductors》2006年第11期2025-2028,共4页半导体学报（英文版）

摘　　要：提出了一种采用共栅频率补偿的轨到轨输入/输出放大器,与传统的Miller补偿相比,该放大器不仅可以消除相平面右边的低频零点,减少频率补偿所需要的电容,还可获得较高的单位增益带宽.所提出的放大器通过CSMC0.6μm CMOS数模混合工艺进行了仿真设计和流片测试:当供电电压为5V,偏置电流为20μA,负载电容为10pF时,其功耗为1.34mW,单位增益带宽为25MHz;当该放大器作为缓冲器,供电电压为3V,负载电容为150pF,输入2.66VPP10kHz正弦信号时,总谐波失真THD为-51.6dB.A rail-to-rail input/output CMOS amplifier using common-gate compensation is proposed. The amplifier achieves a unity gain frequency of 25MHz while employing only one compensation capacitor. The power dissipation of the circuit is 1.34mW with a supply voltage of 5V and a biasing current of 20tzA. Using the proposed circuit,a unity gain buffer is also implemented with a supply voltage of 3V and driving a capacitive load of 150pF. A THD of - 51.6dB is obtained for a 2.66Vpp 10kHz input sine signal. Simulated results reveal a high slew-rate and large driving capability. This amplifier is fabricated in CSMC 0.6tzm CMOS mixed-signal technology. The test results are also provided.

关 键 词：轨到轨 缓冲级 放大器 CMOS 

分 类 号：TN722[电子电信—电路与系统]