A low-power and low noise-figure (NF) 3.1–23.7-GHz CMOS variable-gain amplifier (VGA) is presented. The VGA composes of a complimentary common-source (CCS) first stage, followed by a common-source (CS) second stage. Low power and NF and wideband $S_{11}$ and $S_{21}$ are achieved due to the current-reused CCS input stage with multiple inductive impedance matching and gain compensation. A large gain tuning range (with low NF) is achieved due to the concurrent gate–voltage tuning (or current steering) of the first and the second stages. The VGA consumes 5.85 mW (at $V_{\mathrm {ctrl}}$ of 1 V) and achieves excellent 3-dB bandwidth ( $f_{3\,\mathrm {dB}}$ ) of 20.6 GHz (3.1–23.7 GHz), maximum $S_{21}$ of 11.9 dB, minimum NF (NFmin) of 2.53 dB, average NF (NFavg) of 3.97 dB, small group delay (GD) variation of ±16.5 ps, and input third-order intercept point (IIP3) of −6.5 dBm. Moreover, the VGA achieves a decent gain tuning range of 23.4 dB (−5.4 to 18 dB) for $V_{\mathrm {ctrl}}$ of 0.6–1.6 V. The chip area is 0.364 mm2.

中文翻译：

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具有 2.53dB NF 的 5.85mW 3.1–23.7GHz 两级 CMOS VGA，使用并发电流控制

介绍了一种低功耗和低噪声系数 (NF) 3.1–23.7-GHz CMOS 可变增益放大器 (VGA)。VGA 由一个互补的共源 (CCS) 第一级和一个共源 (CS) 第二级组成。低功耗和 NF 和宽带 $S_{11}$和 $S_{21}$由于电流重用 CCS 输入级具有多个电感阻抗匹配和增益补偿，因此可以实现。由于第一级和第二级的同时栅极电压调谐（或电流转向），实现了大增益调谐范围（具有低 NF）。VGA 消耗 5.85 mW（在 $V_{\mathrm {ctrl}}$1 V）并实现出色的3-dB带宽（ $f_{3\,\mathrm {dB}}$ ) 的 20.6 GHz (3.1–23.7 GHz)，最大 $S_{21}$11.9 dB，最小 NF (NFmin) 为 2.53 dB，平均 NF (NFavg) 为 3.97 dB，小群延迟 (GD) 变化为 ±16.5 ps，输入三阶截取点 (IIP3) 为 -6.5 dBm。此外，VGA 实现了 23.4 dB（-5.4 至 18 dB）的良好增益调谐范围 $V_{\mathrm {ctrl}}$0.6–1.6 V. 芯片面积为 0.364 mm2。