A 2 GHz - 8.7 GHz Wideband Balun-LNA with Noise Cancellation and Gain Boosting

Conference: PRIME 2012 - 8th Conference on Ph.D. Research in Microelectronics & Electronics
06/12/2012 - 06/15/2012 at Aachen, Germany

Proceedings: PRIME 2012

Pages: 4Language: englishTyp: PDF

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Chen, T.; Rodriguez, S. (School of Information and Communication Technology, KTH Royal Institute of Technology, Stockholm, Sweden)
Alarcon, E.; Rusu, A. (Department of Electronics Engineering, UPC Universitat Politecnica de Catalunya, Barcelona, Spain)

A wide band Balun-LNA covering the operation frequency range of magnetic tunnel junction Spin Torque Oscillator is presented. The LNA is a combination of commonsource and cross-coupled common-gate stages, which provides wideband matching and noise cancellation, as well as gain boosting. The internal feedback introduced by the cross-coupling allows an additional degree of freedom to select transistor sizes and bias by decoupling the impedance matching, noise, and gain imbalance trade-offs which are present in similar topologies. Two LNAs using the proposed technique are designed in 65nm CMOS. The LNAs have a simulated bandwidth of 2 GHz - 8.7 GHz, gain of 16 dB, IIP3 of -3.5 dBm, and NF < 3.8 dB while consuming 3.72 mW from a 1.2 V power supply.