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提出了一种高增益带宽积CMOS跨导运算放大器,它采用多级前馈补偿结构。该跨导运算放大器采用调零电阻补偿技术,取消了一个非主极点,以提高电路的增益带宽积。电路采用0.18μm标准CMOS工艺进行设计,并采用Hspice工具仿真。仿真结果表明,在1.2V工作电压下,直流增益为71dB,增益带宽积为1.4GHz,功耗为2.2mW。
A high-gain-bandwidth CMOS transconductance operational amplifier is proposed, which adopts multi-stage feedforward compensation structure. The transconductance operational amplifier using zero-resistance compensation technology, eliminating a non-main pole, in order to improve the circuit gain-bandwidth product. Circuit using 0.18μm standard CMOS process design, and the use of Hspice tool simulation. The simulation results show that under the 1.2V operating voltage, the DC gain is 71dB, the gain bandwidth product is 1.4GHz and the power consumption is 2.2mW.