A 30 GHz Variable Gain Amplifier With High Output Voltage Swing for Ultra-Wideband Radar
A 30 GHz Variable Gain Amplifier With High Output Voltage Swing for Ultra-Wideband Radar
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适用于超宽带雷达的具有高输出电压摆幅的 30 GHz 可变增益放大器
DOI：
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发表时间：
2009
影响因子：
3
通讯作者：
R. Weigel
中科院分区：
文献类型：
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作者：
B. Sewiolo;G. Fischer;R. Weigel
本文报道了一种用于超宽带雷达系统的30 GHz全差分可变增益放大器的分析、设计和特性。该电路由一个可变增益差分级组成，由两个级联的发射极跟随器馈电。电容退化和电感峰化用于提高带宽。在所需频率范围内，最大差分增益为11.5 dB，增益平坦度为plusmn1.5 dB。放大器增益可在0 dB至11.5 dB范围内调节。该电路的输出1 dB压缩点为12 dBm。测得的差分输出电压摆幅为1.23 Vpp。该0.75 mm2宽带放大器消耗560 mW的电源电压为plusmn3.3 V。它是在一个低成本的0.25妈妈SiGe BiCMOS技术制造的截止频率为75 GHz。实验结果与模拟结果吻合得很好。已经提出了一个数字的优点比较放大器的性能，以前报道的作品。
This paper reports on the analysis, design and characterization of a 30 GHz fully differential variable gain amplifier for ultra-wideband radar systems. The circuit consists of a variable gain differential stage, which is fed by two cascaded emitter followers. Capacitive degeneration and inductive peaking are used to enhance bandwidth. The maximum differential gain is 11.5 dB with plusmn1.5 dB gain flatness in the desired frequency range. The amplifier gain can be regulated from 0 dB up to 11.5 dB. The circuit exhibits an output 1 dB compression point of 12 dBm. The measured differential output voltage swing is 1.23 Vpp. The 0.75 mm2 broadband amplifier consumes 560 mW at a supply voltage of plusmn3.3 V. It is manufactured in a low-cost 0.25 mum SiGe BiCMOS technology with a cut-off frequency of 75 GHz. The experimental results agree very well with the simulated response. A figure of merit has been proposed for comparing the amplifier performance to previously reported works.