摘要
This letter presents a broadband digital-controlled variable gain amplifier (VGA) on 65-nm CMOS process. A body-biased digital current-steering topology is proposed to enlarge the gain control range (GCR) of the VGA under low supply voltage. For phased-array applications, a phase compensation network is added to minimize the phase shift during the gain tuning. The proposed VGA achieves a small-signal gain of 16.3/16.1 dB at 28/38 GHz with a 3-dB gain bandwidth from 25.5 to 46 GHz. The measured phase variation is 2.32<inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math> </inline-formula>/4.8<inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math> </inline-formula> with a GCR of 8.7/8.4 dB at 28/38 GHz. The phase variation of the VGA is less than 5<inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math> </inline-formula> and the rms phase error is less than 1.46<inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math> </inline-formula> over a wide frequency band of 27–43 GHz covering multiple 5G bands.
原文 | 英語 |
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頁(從 - 到) | 1-4 |
頁數 | 4 |
期刊 | IEEE Microwave and Wireless Components Letters |
DOIs | |
出版狀態 | 接受/付印 - 2022 |
ASJC Scopus subject areas
- 凝聚態物理學
- 電氣與電子工程