一种低功率恒功率轨间跨导电流循环放大器

2011 IEEE International Conference of Electron Devices and Solid-State Circuits Pub Date : 2011-12-29 DOI:10.1109/EDSSC.2011.6117572

Xiao Zhao, Huajun Fang, Jun Xu

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引用次数: 9

摘要

提出了一种对传统的恒功率轨对轨操作跨导放大器的改进方案。与传统的轨对轨放大器相比，所提出的放大器具有提供相同性能同时消耗一小部分功率的优点。这是通过回收空闲器件的偏置电流来实现的，从而增强了跨导、增益和压转率。该放大器采用中芯国际65nm标准CMOS工艺实现。仿真结果表明，该放大器的单位增益带宽为168.1MHz，直流增益为63.8dB，转换率为23.4V/us，跨导偏差小于8%，功耗比相同设计规格的传统轨对轨放大器降低了50%。

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A low power constant-Gm rail-to-rail operational transconductance amplifier by recycling current

A modification to the conventional constant-gm rail-to-rail operational transconductance amplifier is presented. The proposed amplifier has the benefit of delivering the same performance while consuming a fraction of the power compared to the conventional rail-to-rail amplifier. This is achieved by recycling the bias current of idle devices, which results in an enhanced transconductance, gain and slew rate. The proposed amplifier was implemented in SMIC standard 65nm CMOS process. Simulation results show that the proposed amplifier achieves 168.1MHz unity-gain bandwidth, 63.8dB DC gain, 23.4V/us slew rate and less than 8% deviation in transconductance, but the power consumption reduced by 50% compared to the conventional rail-to-rail amplifier with the same design specifications.

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来源期刊

2011 IEEE International Conference of Electron Devices and Solid-State Circuits

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