| Jing kai (井凯)*,Zhuang Yiqi*,Li Zhenrong*,Lin Zhiyu* **.[J].高技术通讯(英文),2015,21(3):358~363 |
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| Design and analysis on four stage SiGe HBT low noise amplifier |
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| DOI：10.3772/j.issn.1006-6748.2015.03.017 |
| 中文关键词: |
| 英文关键词: low noise amplifier (LNA), pole-zero cancellation, noise figure （NF）, SiGe HBT BJT, linearity |
| 基金项目: |
| Author Name | Affiliation | | Jing kai (井凯)* | | | Zhuang Yiqi* | | | Li Zhenrong* | | | Lin Zhiyu* ** | |
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| 中文摘要: |
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| 英文摘要: |
| Focusing on the linearity shortcoming on a bipolar low noise amplifier (LNA), a new 6~14GHz four stage SiGe HBT LNA is proposed. This amplifier adopts a method of gain allocation on multiple stages to avoid the limitation on linearity especially with the addition of negative gain on the third stage. To realize gain flatness, extra zero is introduced to compensate the gain roll-off formed by pole, and local shunt-shunt negative feedback is used to widen the bandwidth as well as optimize circuit’s noise. Simulated results have shown that in 6~14GHz, this circuit achieves noise figure （NF） less than 3dB, gain of 17.8dB (+0.2dB), input and output reflection parameters of less than -10dB, and the K factor is above 1.15. |
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