具有低失调电压的新型灵敏放大器设汁

doi:10.16257/j.cnki.1681-1070.2020.0507

电子与封装 ›› 2020, Vol. 20 ›› Issue (5): 050304 . doi: 10.16257/j.cnki.1681-1070.2020.0507

具有低失调电压的新型灵敏放大器设汁

常红^1,2,封晴¹,陆生礼²,肖培磊¹,李娟¹

1.中科芯集成电路有限公司，江苏无锡 214000；2.东南大学电子科学与工程学院，南京 210009

出版日期:2020-05-25 发布日期:2020-02-28
作者简介:常红（1990—），男，安徽六安人，毕业于安徽大学微电子学于固体电子学专业，获得博士学位，现于主要研究方向为微纳电子器件模拟与建模，集成电路设计。

Design of a Novel Sense Amplifier with Low Offset Voltage

CHANG Hong^1,2, FENG Qing¹, LU Shengli², XIAO Peilei¹, LI Juan¹

1.China Key System & Integrated Circuit Co., Ltd., Wuxi 214000, China;2.Departments of Electronics Science & Engineering, University of Southeast, Nanjing 210009, China

Online:2020-05-25 Published:2020-02-28

摘要/Abstract

摘要： 随着器件尺寸越来越小，器件之间的失配越来越严重，由器件失配引起的失调电压对灵敏放大器性能的影响越来越大。针对此情况，根据灵敏放大器的工作原理，提出了一种具有失调电压自调整的灵敏放大器，通过增加校准支路来平衡灵敏放大器两边的放电速度，从而降低失调电压，减小其对灵敏放大器性能的影响。基于SMIC 65 nm CMOS工艺的后仿真结果显示，在电源电压1.2 V、TT工艺角、室温条件下，相比于传统的灵敏放大器，该新型灵敏放大器的失调电压的标准偏差降低了61.9%，SRAM的读关键路径延迟降低了25%。

关键词: SRAM；灵敏放大器；失调电压；自校准

Abstract: With the decreasing of device size, the mismatch between devices becomes more and more serious, and the offset voltage caused by transistor mismatch has a significant effect on sense amplifier performance. Based on the operating principle of sense amplifier, a novel sense amplifier with self-calibration character is proposed. The reduction of offset voltage can be realized by two calibrated branches, which were used to balance the discharging current between two storage nodes of sense amplifier. The simulation results show that the standard deviation of offset voltage of the proposed sense amplifier is 61.9% smaller than that of the conventional current latch sense amplifier at 1.2 V supply voltage, TT corner and room temperature in SMIC 65 nm CMOS technology. As a result, the sensing delay of the read critical path is reduced by 25%.

Key words: SRAM; sense amplifier; offset voltage; self-calibration

中图分类号:

TN492

常红,封晴,陆生礼,肖培磊,李娟. 具有低失调电压的新型灵敏放大器设汁[J]. 电子与封装, 2020, 20(5): 050304 .

CHANG Hong, FENG Qing, LU Shengli, XIAO Peilei, LI Juan. Design of a Novel Sense Amplifier with Low Offset Voltage[J]. Electronics & Packaging, 2020, 20(5): 050304 .

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具有低失调电压的新型灵敏放大器设汁

Design of a Novel Sense Amplifier with Low Offset Voltage

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