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A 16-24-GHz SiGe Decibel-Linear Low-Gain-Error Digitally Controlled High-Efficiency Variable Gain Amplifier
Journal article   Peer reviewed

A 16-24-GHz SiGe Decibel-Linear Low-Gain-Error Digitally Controlled High-Efficiency Variable Gain Amplifier

Zhenhua Xu, Fanyi Meng, Kaixue Ma, Haipeng Fu, Xiangyang Duan, Ming Lu, Yenan Bie and Jianli Liu
IEEE microwave and wireless components letters, Vol.32(6), pp.543-546
01/06/2022
DOI: https://doi.org/10.1109/LMWC.2021.3138845

Abstract

<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">K -band Current measurement Current mirrors Gain Gain measurement low gain-error Measurement uncertainty SiGe Silicon germanium Switches variable-gain amplifier (VGA)
This letter presents a 16-24-GHz decibel-linear low-gain-error variable gain amplifier (VGA) in 130-nm SiGe technology. Negative feedback resistor is used in current source to expand the gain variation range and improve decibel-linearity. The nonproportion metal-oxide-semiconductor (MOS) array is introduced to reduce the gain variation error. This design achieves a 15-0 dB gain variation range at 1-dB gain step with root mean square (rms) gain-error less than 0.3 dB. The measured OP 1dB is greater than 9.5 dBm between the 1-dB bandwidth of 16-24 GHz and this VGA consumes 8.8 mA from a 1.6-V supply.

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