Kil-Hoon Lee

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Publications (2)0 Total impact

  • Conference Proceeding: An adaptive broadband BiCMOS active spur canceller
    A. Trippe, E. Juntunen, D. Bhatta, K. Chuang, Kil-Hoon Lee, J. Laskar, J. Papapolymerou, E. Gebara
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    ABSTRACT: An active interference cancellation system is presented in BiCMOS 8HP capable of eliminating undesired signals resulting from an on-chip clock whose fundamental and/or harmonics couple into a receiver path. The cancellation system is capable of eliminating undesired clock fundamentals from 6 - 10 GHz and its harmonics up to 30 GHz. By modeling the coupling channel, the system recovers receiver sensitivity and is independent of the aggressing clock rate and amplitude fluctuations. A variable phase rotator, comb generator, and an amplitude modulator are used to achieve the cancellation. The use of a comb generator in a cancellation system is novel and enables harmonic cancellation. Over 25 dB of cancellation for an aggressing clock and its harmonics have been achieved. A series-to-parallel bus that communicates with all system sub-blocks provides a healing aspect to the system. The total power consumption of the canceller system is 71 mW.
    Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International; 07/2011
  • Conference Proceeding: A 10Gb/s two dimensional scanning eye opening monitor in 0.18um CMOS process
    D. Bhatta, Kil-Hoon Lee, Hyoung Soo Kim, E. Gebara, J. Laskar
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    ABSTRACT: An eye-opening monitor (EOM) capable of providing qualitative two-dimensional (2D) map of the eye opening of a 10 Gbps signal is designed. The EOM is designed in 0.18 um CMOS process. The 2D map of the eye opening is obtained by scanning the eye opening with a phase-offset clock to obtain the different best-fit mask sizes. In the present design the clock is provided from an external source. The design operates with a 1.8 V supply and consumes 95 mA of current.
    Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International; 07/2009
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