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Title: Wideband variable-gain amplifiers based on a pseudo-current-steering gain-tuning technique
Authors: Kong, Lingshan
Chen, Yong
Yu, Haohong
Pan, Quan
Boon, Chirn Chye
Mak, Pui-In
Martins, Rui P.
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Kong, L., Chen, Y., Yu, H., Pan, Q., Boon, C. C., Mak, P.-I., & Martins, R. P. (2019). Wideband variable-gain amplifiers based on a pseudo-current-steering gain-tuning technique. Proceedings of the 2019 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), 153-156. doi:10.1109/APCCAS47518.2019.8953084
Journal: 2019 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
Abstract: This paper reports two variable-gain amplifiers (VGAs) featuring a new pseudo-current-steering gain-tuning technique. In the first VGA (VGA-I), a single-voltage-controlled dual-branch current mirror is exploited as a standalone gain control block. In the second VGA (VGA-II), two NMOS transistors, which are biased by a tunable voltage, are integrated into a conventional common-source amplifier to steer away partial of the total current. Fabricated in 40-nm CMOS technology, the VGA-I (VGA-II) occupies a tiny area of 0.03 mm 2 (0.024 mm 2 ) and consumes 22 mW (20 mW). Measured over a gain range of > 64 dB, the -3-dB bandwidth of the VGA-I (VGA-II) is 9 GHz (6.6 GHz). For the time-domain tests, VGA-I (VGA-II) exhibits a jitter of 40 ps (30 ps), under a 2 7 -1 PRBS input at 12 Gb/s. Their power efficiencies (1.83 and 1.67 pJ/bit) compare favorably with state-of-the-art wideband VGAs.
ISSN: 978-1-7281-2941-9
DOI: 10.1109/APCCAS47518.2019.8953084
Rights: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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