| Citation: |
Zhang Hao, Li Zhiqun, Wang Zhigong, Zhang Li, Li Wei. A CMOS variable gain low-noise amplifier with ESD protection for 5 GHz applications[J]. Journal of Semiconductors, 2010, 31(5): 055005. doi: 10.1088/1674-4926/31/5/055005
Zhang H, Li Z Q, Wang Z G, Zhang L, Li W. A CMOS variable gain low-noise amplifier with ESD protection for 5 GHz applications[J]. J. Semicond., 2010, 31(5): 055005. doi: 10.1088/1674-4926/31/5/055005.
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A CMOS variable gain low-noise amplifier with ESD protection for 5 GHz applications
doi: 10.1088/1674-4926/31/5/055005
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Abstract
This paper presents a variable gain low-noise amplifier (VG-LNA) for 5 GHz applications. The effect of the input parasitic capacitance on the inductively degenerated common source LNA’s input impedance is analyzed in detail. A new ESD and LNA co-design method was proposed to achieve good performance. In addition, by using a simple feedback loop at the second stage of the LNA, continuous gain control is realized. The measurement results of the proposed VG-LNA exhibit 25 dB ((-3.3 dB to 21.7 dB) variable gain range, 2.8 dB noise figure at the maximum gain and 1 dBm IIP3 at the minimum gain, while the DC power consumption is 9.9 mW under a 1.8 V supply voltage.-
Keywords:
- continuous variable gain
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