A Frequency-Selective Broadband Low-Noise Amplifier With Double-Loop Transformer Feedback

作者：Bagga Sumit^*; Mansano Andre L; Serdijn Wouter A; Long John R; Van Hartingsveldt Koen; Philips Kathleen

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2014, 61(6): 1883-1891.

DOI：10.1109/TCSI.2013.2295010

• Broadband
• frequency selectivity
• low-noise amplifier
• monolithic transformers
• transformer feedback

A frequency-selective, power-to-current (P-I) broadband low-noise amplifier (FS-LNA) is presented. The use of global and/or local feedback in tandem is investigated, where monolithic transformers realize the feedback loops. Superior performance is realized when global and local feedbacks are interwound. A cascode gain stage with a current-to-current positive feedback loop to boost the power gain and a current-to-current negative feedback loop for impedance and/ or noise matching is implemented in 90 nm RF-CMOS. The FS-LNA also provides at least 20 dB RF signal rejection at frequencies below the L-band (includes GPS and GSM carriers). Themeasured gain, noise figure and 1-dB gain compression point of the LNA from 3.5-9.25 GHz are 15 +/- 3 dB, 2.4 +/- 0.8 dB, -17.5 +/- 2.5 dBm and, respectively. The chip area of the LNA is 0.7 x 0.8 mm(2). The FS-LNA consumes 9.6 mW from a 0.8 V power supply. It is most suitable for sub-1 V single-cell integrated radios and can be used formultiband/ multistandard wireless technologies, such as broadband impulse-radio ultra-wideband (IR-UWB) and frequency modulated (FM) UWB.

• 出版日期2014-6