Fig. 1.
(a) LNA topology and (b) simplified small signal equivalent circuit
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| Citation: |
Renjie Zhou, Yong Xiang, Hong Wang, Yebing Gan, Min Qian, Chengyan Ma, Tianchun Ye. A sub-1-dB noise figure monolithic GNSS LNA[J]. Journal of Semiconductors, 2013, 34(9): 095010. doi: 10.1088/1674-4926/34/9/095010
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R J Zhou, Y Xiang, H Wang, Y B Gan, M Qian, C Y Ma, T C Ye. A sub-1-dB noise figure monolithic GNSS LNA[J]. J. Semicond., 2013, 34(9): 095010. doi: 10.1088/1674-4926/34/9/095010.
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Abstract
A monolithic integrated low noise amplifier (LNA) based on a SiGe HBT process for a global navigation satellite system (GNSS) is presented. An optimizing strategy of taking parasitic capacities at the input node into consideration is adopted and a method and design equations of monolithically designing the LC load and the output impedance matching circuit are introduced. The LNA simultaneously reaches excellent noise and input/output impedance matching. The measurement results show that the LNA gives an ultra-low noise figure of 0.97 dB, a power gain of 18.6 dB and a three-order input intermodulation point of -6 dBm at the frequency of 1.575 GHz. The chip consumes 5.4 mW from a 1.8 V source and occupies 600×650 μm2 die area.-
Keywords:
- LNA,
- GNSS,
- monolithic integrated,
- SiGe HBT
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References
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