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National Changhua University Department of Graduate Institute of Integrated Circuit Design

RF CMOS Low-Phase-Noise LC Oscillator Through Memory Reduction Tail Transistor C. C. Boon, M. A. Do, K. S. Yeo, J. G. Ma, and X. L. Zhang IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS Page(s):85 - 90 Feb. 2004. National Changhua University

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National Changhua University Department of Graduate Institute of Integrated Circuit Design

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  1. RF CMOS Low-Phase-Noise LC Oscillator Through Memory Reduction Tail TransistorC. C. Boon, M. A. Do, K. S. Yeo, J. G. Ma, and X. L. ZhangIEEE TRANSACTIONS ON CIRCUITS AND SYSTEMSPage(s):85 - 90 Feb. 2004 National Changhua University Department of Graduate Institute of Integrated Circuit Design Advisor : Dr. Zhi-Ming Lin Advisee : Shi-Hao Zheng

  2. Outline • ABSTRACT • INTRODUCTION • FIGURE OF MERIT • VCO TOPOLOGIES • PERFORMANCE COMPARISON OF THE THREE VCO TOPOLOGIES • CONCLUSION

  3. ABSTRACT • The 1/f noise can be reduced through a switched gate. • The flicker noise generated is inversely proportional to the gate switching frequency. • The novel tail transistor topology is compared to the two popular tail transistor topologies.

  4. INTRODUCTION • The tail transistor may be the largest contributor to the phase noise in a VCO. • The noise sources from the tail transistor can be categorized into high-frequency noise source and low-frequency noise source.

  5. FIGURE OF MERIT

  6. VCO TOPOLOGIES

  7. VCO TOPOLOGIES

  8. PERFORMANCE COMPARISON OF THE THREE VCO TOPOLOGIES

  9. CONCLUSION

  10. Thank you for your attention! Q&A

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