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學生 : 李國彰 指導教授 : 賴永齡老師

學生 : 李國彰 指導教授 : 賴永齡老師. A 1.5V 2.4GHz CMOS Mixer with high linearity ( The 2004 IEEE Asia-Pacific Conference on Circuits and Systems , December 6-9 , 2004 ). Outline. Abstract Introduction Design methodology of mixers Simulation Results Conclusion Reference. Abstract.

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學生 : 李國彰 指導教授 : 賴永齡老師

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  1. 學生:李國彰指導教授:賴永齡老師 A 1.5V 2.4GHz CMOS Mixer with high linearity ( The 2004 IEEE Asia-Pacific Conference on Circuits and Systems , December 6-9 , 2004 )

  2. Outline • Abstract • Introduction • Design methodology of mixers • Simulation Results • Conclusion • Reference

  3. Abstract • High linearity • ISM band • Modified Class AB transconductor • Common mode feedback circuitry

  4. Introduction • GaAs , Bipolar >> high cost , complexity • CMOS • Down-convert • Up-convert • IIP3 , P 1dB

  5. Introduction • SFDR ( spurious-free dynamic range )

  6. Design methodology of mixers • Source degeneration • CMOS gm Cell • Modified Class AB transconductor • C1 C2->DC-blocking • M5-M8 ->promote isolation

  7. Design methodology of mixers • M11-M14 -> switch • M15 M16 R1 R2 ->load stage • M17-M21->CMFB circuit ->stable dc level ->conversion gain

  8. Simulation Results • RF->2.4GHz • LO->2.3GHz • IF->100MHz • 3.73mA from a 1.5V • Tsmc 0.18μm Mixed signal CMOS RF model

  9. Conclusion • Transconductor -> linearity of a mixer • CMFB with the modified Class AB transconductor->improve IIP3 , conversion gain

  10. Reference

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