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


提出了一种低功耗、低噪声系数 (NF) 3.1–23.7-GHz CMOS 可变增益放大器 (VGA)。 VGA 由互补共源 (CCS) 第一级和随后的共源 (CS) 第二级组成。低功耗、NF 和宽带$S_{11}$和$S_{21}$这是由于电流复用的CCS输入级具有多个电感阻抗匹配和增益补偿而实现的。由于第一级和第二级同时进行栅极电压调谐（或电流控制），因此实现了大增益调谐范围（具有低噪声系数）。 VGA 功耗 5.85 mW（在$V_{\mathrm {ctrl}}$ 1 V）并实现出色的 3 dB 带宽（ $f_{3\,\mathrm {dB}}$ ) 20.6 GHz (3.1–23.7 GHz)，最大值$S_{21}$ 11.9 dB，最小噪声系数 (NFmin) 为 2.53 dB，平均噪声系数 (NFavg) 为 3.97 dB，小群延迟 (GD) 变化为 ±16.5 ps，输入三阶交调点 (IIP3) 为 -6.5 dBm。此外，VGA 还实现了 23.4 dB（−5.4 至 18 dB）的不错的增益调谐范围$V_{\mathrm {ctrl}}$ 0.6–1.6 V。芯片面积为 0.364 mm2。