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A 90-nm Wideband Merged CMOS LNA and Mixer Exploiting Noise Cancellation

A 90-nm Wideband Merged CMOS LNA and Mixer Exploiting Noise Cancellation. Final Project in RFCS in the MINT Program of the UPC by Sven Günther. Scope. Introduction Wideband LNA LNA Core and Noise Analysis Final LNA Topology Merged LNA and Mixer Measurement and Simulation Results

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A 90-nm Wideband Merged CMOS LNA and Mixer Exploiting Noise Cancellation

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  1. A 90-nm Wideband Merged CMOS LNA and Mixer Exploiting Noise Cancellation Final Project in RFCS in the MINT Program of the UPC by Sven Günther

  2. Scope • Introduction • Wideband LNA • LNA Core and Noise Analysis • Final LNA Topology • Merged LNA and Mixer • Measurement and Simulation Results • Conclusion RFCS - MINT Program

  3. 1. Introduction • Why do we need wideband RF receivers? • Many number of wireless LAN standards in different frequency bands • Use for Software Defined Radio (SDR) with single flexible receiver • Less power consumption and chip area RFCS - MINT Program

  4. 2. Wideband LNA • Topologies • Resistive feedback LNA • Distributed amplifier LNA • Inductive source-degeneration common-source LNA (resistive feed back/LC-bandpass at the input) • Common-gate LNA • Noise Figure: F = 1 + γ/α RFCS - MINT Program

  5. 3. LNA Core and Noise Analysis • Cascode structure • Input impedance RFCS - MINT Program

  6. 3. LNA Core and Noise Analysis • Noise Analysis • Assumption that Thermal Noise is Main Noise Source • Input Power Matching Condition: RFCS - MINT Program

  7. 3. LNA Core and Noise Analysis • Noise Analysis • Noise Factor • Optimum Noise Factor for • For Rin=100 Ω, Rs=50 Ω, gm1=28.28 mS, gm3=8.28 RFCS - MINT Program

  8. 4. Final LNA Topology • M3 and M4 pMOS due to less Vth • M5 to M8 inductively degenerated for Output Current Noise Reduction RFCS - MINT Program

  9. 5. Merged LNA and Mixer • Less transistors in signal path • Lower non-linearities • Less power consumption RFCS - MINT Program

  10. 5. Merged LNA and Mixer • Final Noise Factor • For the design with I=0.7 mA, RL=350 Ω, A=0.25 mV (amplitude of single-ended LO signal) RFCS - MINT Program

  11. 6. Measurement and Simulation Results RFCS - MINT Program

  12. 7. Conclusion • Merged LNA and Mixer realized in 90 nm CMOS • Compact Size • Low Power Consumption • Suitable for multiband operation RFCS - MINT Program

  13. Thank you for your Attention! Any Questions? RFCS - MINT Program

  14. Bibliography • [1] A. Amer, E. Hegazi, and H. F. Ragaie, “A 90-nm Wideband Merged CMOS LNA and Mixer Exploiting Noise Cancellation,” IEEE J. Solid-State Circuits, vol. 42, no. 2, pp. 323-328, Feb 2007. • [2] H. Sjöland, A. Sanjaani, and A. Abidi, “A merged CMOS LNA and mixer for a WCDMA receiver,” IEEE J. Solid- State Circuits, vol. 38, no. 6, pp. 1045–1050, Jun 2003. • [3] H. Darabi and A. Abidi, “Noise in RF-CMOS mixers: A simple physical model,” IEEE J. Solid-State Circuits, vol. 35, no. 1, pp. 15–25, Jan. 2000. • [4] M. Kawashima, H. Hayashi, T. Nakagawa, K. Nishikawa, and K. Araki, “A 0.9-2.6 GHz broadband RF front-end for direct conversion transceivers,” in IEEE MTT-S 2002 Int. Microwave Symp. Dig., pp. 927–930. • [5] V. J. Arkesteijn, E. A. M. Klumperink, and B. Nauta, “A wideband high-linearity RF receiver front-end in CMOS,” in Proc. ESSCIRC, 2004, pp. 71–74. RFCS - MINT Program

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