Design of a New Variable Gain Amplifier

被引：0

作者：

Li, Juzhe ^{[1
]}

Liu, Xu ^{[1
]}

Zhao, Di ^{[1
]}

Liu, Jiahui ^{[1
]}

Bi, Chengju ^{[2
]}

机构：

[1] Beijing Univ Technol, Beijing, Peoples R China

[2] Beijing Construct & Civil Engn Co Ltd, Beijing, Peoples R China

来源：

PROCEEDINGS OF 2019 IEEE 13TH INTERNATIONAL CONFERENCE ON ANTI-COUNTERFEITING, SECURITY, AND IDENTIFICATION (IEEE-ASID'2019) | 2019年

基金：

中国国家自然科学基金;

关键词：

VGA; high dynamic range; exponential; current source;

D O I：

10.1109/icasid.2019.8925004

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper proposes a new variable gain amplifier (VGA) using the tunable exponential tail current source. Compared to the traditional digitally controlled VGA where constant tail current source is applied, the proposed design improves the dynamic range due to the larger current provided by the exponential tail current source. Moreover, tail current source array is used in this work to further increase the dynamic range. This new VGA circuit design is completed using SMIC 0.18 pm CMOS process in Cadence. The simulation results show that the total exponential tail current for each stage ranges from 4.7 RA -279 mu A, and a dynamic range of -3 dB similar to 35 dB, with 6.67 MHz bandwidth is achieved.

引用

页码：56 / 60

页数：5

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