Sub-0.2 dB Noise Figure Wideband Room-Temperature CMOS LNA With Non-50 $\Omega$ Signal-Source Impedance
Sub-0.2 dB Noise Figure Wideband Room-Temperature CMOS LNA With Non-50 $\Omega$ Signal-Source Impedance
复制标题
噪声系数低于 0.2 dB 的宽带室温 CMOS LNA，具有非 50 $Omega$ 信号源阻抗
DOI：
10.1109/jssc.2007.907172
复制
发表时间：
2007
影响因子：
5.4
通讯作者：
J. Haslett
中科院分区：
文献类型：
--
作者：
L. Belostotski;J. Haslett
本文介绍了一种用于平方公里阵列射电望远镜接收机第一级的宽带低噪声放大器（LNA）。讨论了低噪声放大器的设计过程和版图特点。噪声系数优化程序确定导致噪声系数降低的信号源电阻。在射电望远镜中使用时，所需的信号源电阻将由望远镜定制的天线单元提供。LNA采用90 nm体CMOS设计，在800 MHz至1400 MHz范围内实现了低于0.2 dB的噪声系数，回波损耗超过11 dB，50负载驱动增益超过17 dB，输出1 dB压缩点为2 dBm，输出IP3为12 dBm，输出IP2为22 dBm，1 V电源功耗为43 mA。在本文提出的LNA实现中，负载扼流电感和源极电感被集成，而共源共栅两个晶体管之间的栅极、偏置和扼流电感则在外部。所提出的LNA的噪声系数是我们所知道的最低噪声系数实现的功率匹配宽带CMOS LNA在室温下。
This paper presents a wideband low-noise amplifier (LNA) designed to be used as the first stage of the receiver in the Square Kilometer Array radio telescope. The LNA design procedure and its layout features are discussed. The noise figure optimization procedure determines the signal-source resistance that results in reduced noise figure. When used in the radio telescope, the required signal-source resistance will be presented by the telescope custom-made antenna elements. The LNA, designed in 90 nm bulk CMOS, achieves sub-0.2 dB noise figure from 800 MHz to 1400 MHz, return loss of more than 11 dB, gain of more than 17 dB driven into a 50 load, output 1 dB compression point of 2 dBm, output IP3 of 12 dBm, and output IP2 of 22 dBm while consuming 43 mA from a 1 V supply. In the LNA implementation presented in this paper the load choke inductor and the source inductor are integrated whereas the gate-, bias-, and the choke-inductor between two transistors of the cascode are external. The noise figure of the presented LNA is to our knowledge the lowest noise figure achieved by a power matched wideband CMOS LNA at room temperature.