A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process

Jeng Han Tsai; Chia Lung Lin

doi:10.1109/LMWC.2019.2942013

A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process

Jeng Han Tsai^*, Chia Lung Lin

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

Original language	English
Article number	8856253
Pages (from-to)	729-732
Number of pages	4
Journal	IEEE Microwave and Wireless Components Letters
Volume	29
Issue number	11
DOIs	https://doi.org/10.1109/LMWC.2019.2942013
Publication status	Published - 2019 Nov

Keywords

Current steering
digital control
low phase variation
millimeter-wave (MMW)
variable gain amplifier (VGA)

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2019.2942013

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title = "A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process",

abstract = "A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.",

keywords = "Current steering, digital control, low phase variation, millimeter-wave (MMW), variable gain amplifier (VGA)",

author = "Tsai, {Jeng Han} and Lin, {Chia Lung}",

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AU - Tsai, Jeng Han

AU - Lin, Chia Lung

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N2 - A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

AB - A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

KW - Current steering

KW - digital control

KW - low phase variation

KW - millimeter-wave (MMW)

KW - variable gain amplifier (VGA)

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A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process

Abstract

Keywords

ASJC Scopus subject areas

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