乒乓自动调零仪表放大器设计

2021 6th International Conference on Integrated Circuits and Microsystems (ICICM) Pub Date : 2021-10-22 DOI:10.1109/ICICM54364.2021.9660354

Jun’an Zhang, Cong Peng, Yi Xu

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引用次数: 0

摘要

介绍了一种乒乓自动调零仪表放大器。采用乒乓结构，校准速度快。采用AB级输出结构的折叠级联码作主放大器。采用增益增强结构的折叠级联码作为辅助放大器。两个放大器都有一对额外的输入端子用于偏置校准。仿真结果表明，失调电压为0.7μV，直流增益150dB，主放大器单位增益带宽为1.9MHz，共模抑制比为130dB，功耗为1.4mW。该放大器采用0.5μm CMOS工艺，单电源电压为5V。

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A Ping-Pong Auto-Zero Instrumentation Amplifier Design

A ping-pong auto-zero instrumentation amplifier is presented in this paper. Ping-pong structure is utilized for fast calibration speed. Folded-cascode with class AB output structure are utilized as main amplifier. Folded-cascode with gain boosting structure are utilized as auxiliary amplifier. Both amplifier has a pair of additional input terminals for offset calibration. Simulation results show that the offset voltage is 0.7μV, DC gain is 150dB, unity gain bandwidth of main amplifier is 1.9MHz, common-mode rejection ratio is 130dB, and power consumption is 1.4mW. The design of this amplifier is based on 0.5μm CMOS process with a single supply voltage of 5V.

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来源期刊

2021 6th International Conference on Integrated Circuits and Microsystems (ICICM)

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