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首页> 外文期刊>Analog Integrated Circuits and Signal Processing >A 0.4-3.3 GHz low-noise variable gain amplifier with 35 dB tuning range, 4.9 dB NF, and 40 dBm IIP2
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A 0.4-3.3 GHz low-noise variable gain amplifier with 35 dB tuning range, 4.9 dB NF, and 40 dBm IIP2

机译：一个0.4-3.3 GHz低噪声可变增益放大器，具有35 dB调谐范围，4.9 dB NF和40 dBm IIP2

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摘要

This work presents a low-noise variable gain amplifier (LNVGA) in which the IIP2 is very high, and the gain control is applied to improve the system dynamic range, even with the limitations of the CMOS technology. Two stages compose the LNVGA, a low-noise amplifier, that keeps the noise figure (NF) at low values, and a variable voltage attenuator (VVA), that provides the gain variation. We have applied on the VVA the phase cancellation technique, in which the addition of two out-of-phase signals controls the gain. This technique provides a large gain tuning range only if the paths of the two signalsto be added are well balanced; hence, a precise 180 degrees phase difference is required. In this desing we propose an active balun with small imbalance, which creates those signals. The LNVGA was implemented in 130 nm CMOS with a 1.2 V supply. The measurement results show a 35 dB gain tuning range, varying from 10 to - 25 dB, a 4.9 dB minimum NF, a - 10 dBm IIP3, and an IIP2 as high as + 40 dBm.
机译：这项工作介绍了一个低噪声可变增益放大器（LNVGA），其中IIP2非常高，并且即使是CMOS技术的限制，增益控制也适用于改善系统动态范围。两个阶段组成LNVGA，低噪声放大器，使噪声系数（NF）保持在低值，以及提供增益变化的可变电压衰减器（VVA）。我们已经应用于VVA相位取消技术，其中添加了两个超相位信号控制增益。该技术仅提供大的增益调谐范围，仅当添加两个信号STO的路径均衡很平衡;因此，需要精确的180度相位差。在这个Desing中，我们提出了一个具有小不平衡的活跃的恶作剧，创造了那些信号。 LNVGA以130nm CMO在130nm的CMO中实现，具有1.2 V供应。测量结果显示35 dB增益调谐范围，从10到-25 dB，4.9 dB最小NF，A - 10 dBm IIP3和IIP2高达高达+ 40 dBm的IIP 2。

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