High-gain reconfigurable LNA using optimized Q-factor inductor and switched capacitor
✍ Scribed by Ho-Jun Chang; Kun-Man Park; Jung-Hyun Ham; Tae-Yeoul Yun
- Book ID
- 102517636
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 228 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
This letter presents a band‐selectable LNA with high gain and low noise in 0.25‐μm RF CMOS technology.The proposed reconfigurable LNA uses two techniques: optimized spiral inductors and a switched capacitor technique. The gain and noise figure of the LNA are improved by using Q‐factor optimized inductors, which are designed with an octagonal shape having a peak Q‐factor at desired frequency bands. The high Q‐factor of the switched capacitor in parallel configuration at the load also increases the gain of the band‐selectable LNA. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1069–1074, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25945