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Adviser ： Zhi-Ming Lin postgraduate： Jhih-Yuan Lyu E-Mail ： m94662010@mail.ncue.tw

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Adviser ： Zhi-Ming Lin postgraduate： Jhih-Yuan Lyu E-Mail ： m94662010@mail.ncue.tw

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  1. National Changhua University of EducationGraduate Institute of Integrated Circuit DesignA 0.1 -23 GHzSiGe BiCMOS Analog Multiplier and Mixer Based on Attenuation-Compensation Technique IEEE Radio Frequency Integrated Circuits Symposium 2004Ming-Da Tsai, Chin-Shen Lin, Chi-Hsueh Wang, Chun-Hsien Lienand Huei Wang Adviser：Zhi-Ming Lin postgraduate：Jhih-Yuan Lyu E-Mail：m94662010@mail.ncue.edu.tw May 14th, 2007

  2. Outline • Abstract • Introduction • Mixer schematic • Chip micrograph • Measurement • Circuit performance • Conclusion • References

  3. Abstract • 0.35-um SiGe BiCMOS • LC ladder matching networks • Conversion Gain can achieved 19 dB with a 3-dB bandwidth from 0.1 to 23 GHz • Attenuation-Compensation Technique • Chip area is 1.5 ×1 mm2

  4. High gain bandwidth product Introduction The speed of a device is typically quantified by its maximum unity gain cut-off frequency (fT ) or maximum oscillation frequency (fmax) This work：highest GBP of operation among previously reported MMIC mixers

  5. Gilbert circuit Good isolation High gain CG=(2．gm．R)/π Gm=ID/VT Mixer schematic Buffer matching networks Increase coversion gain DC Bias Charge-injection method promote the overall conversion ID ID Attenuation-compensation：In order to promote bandwidlh and conversion gain LC ladder T-section Transmission line matching networks Twice ID CG Increase Current mirror To stabilize current Increase IIP3 CG=(2．gm．R)/π gm increase

  6. Chip micrograph BJT Vcc Inductor RF LO

  7. Measurement LO：0dBm RF: 10GHz CG：20dB CG：20dB LO：0dBm Conversion Gain can achieved 19 dB with a 3-dB bandwidth from 0.1 to 23 GHz

  8. Circuit performance

  9. Conclusion • 0.35-um SiGe BiCMOS • Attenuation-compensation method • LC ladder matching • Highest gain-bandwidthproduct • Fault • Power consumption is too much • Return loss(S11) is not less than -10dB of this broadband mixer

  10. References

  11. Thanks for your attention

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